cmake then make on CentOS 7.9.2009

-- Build type is: Release
-- The CXX compiler identification is GNU 4.8.5
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ - works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Downloading wigxjpf 
-- Downloading Eigen3 
-- Eigen3 3.3.4
-- Found PythonInterp: /home/berenger/usr/miniconda/bin/python3 (found suitable version "3.9.1", minimum required is "3") 
-- Found PythonLibs: /home/berenger/usr/miniconda/lib/libpython3.9.so
-- Downloading pybind11 
-- pybind11 v2.3.0
-- Installation ROOT: /home/berenger/usr/miniconda
-- cpplint parser: /home/berenger/usr/miniconda/bin/cpplint
-- clang-format not found, so the pretty-cpp target is unavailable
-- BLACK auto formatter: /home/berenger/usr/miniconda/bin/black
-- Configuring done
-- Generating done
-- Build files have been written to: /home/berenger/src/librascal/build
Scanning dependencies of target rascal
[  3%] Building CXX object src/CMakeFiles/rascal.dir/rascal/utils/json_io.cc.o
In file included from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43:0,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/home/berenger/src/librascal/src/rascal/external/json.hpp:2221:19: error: base class 'struct nlohmann::detail::index_sequence<>' has a non-virtual destructor [-Werror=effc++]
 template<> struct make_index_sequence<0> : index_sequence<> {};
                   ^
/home/berenger/src/librascal/src/rascal/external/json.hpp:2222:19: error: base class 'struct nlohmann::detail::index_sequence<0ul>' has a non-virtual destructor [-Werror=effc++]
 template<> struct make_index_sequence<1> : index_sequence<0> {};
                   ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::priority_tag<1u>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2228:29:   recursively required from 'struct nlohmann::detail::priority_tag<2u>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2228:29:   required from 'struct nlohmann::detail::priority_tag<3u>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3042:115:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2228:29: error: base class 'struct nlohmann::detail::priority_tag<0u>' has a non-virtual destructor [-Werror=effc++]
 template<unsigned N> struct priority_tag : priority_tag < N - 1 > {};
                             ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::priority_tag<2u>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2228:29:   required from 'struct nlohmann::detail::priority_tag<3u>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3042:115:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2228:29: error: base class 'struct nlohmann::detail::priority_tag<1u>' has a non-virtual destructor [-Werror=effc++]
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::priority_tag<3u>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3042:115:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2228:29: error: base class 'struct nlohmann::detail::priority_tag<2u>' has a non-virtual destructor [-Werror=effc++]
In file included from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43:0,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<nlohmann::detail::value_t>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = nlohmann::detail::value_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from 'struct std::__is_direct_constructible_impl<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_destructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, std::__is_direct_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:817:12:   required from 'struct std::__is_direct_constructible_new_safe<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:895:12:   required from 'struct std::__is_direct_constructible_new<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:903:12:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, nlohmann::detail::value_t, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, nlohmann::detail::value_t>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = nlohmann::detail::value_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = nlohmann::detail::value_t; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = nlohmann::detail::value_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<nlohmann::detail::value_t, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::value_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<nlohmann::detail::value_t, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::value_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 8 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, nlohmann::detail::value_t>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = nlohmann::detail::value_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = nlohmann::detail::value_t; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = nlohmann::detail::value_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<nlohmann::detail::value_t, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::value_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<nlohmann::detail::value_t, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::value_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, nlohmann::detail::value_t, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   [ skipping 7 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, nlohmann::detail::value_t, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, nlohmann::detail::value_t, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, nlohmann::detail::value_t>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = nlohmann::detail::value_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = nlohmann::detail::value_t; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = nlohmann::detail::value_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<nlohmann::detail::value_t, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::value_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<nlohmann::detail::value_t, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::value_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 8 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, nlohmann::detail::value_t>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = nlohmann::detail::value_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = nlohmann::detail::value_t; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = nlohmann::detail::value_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<nlohmann::detail::value_t, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::value_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<nlohmann::detail::value_t, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::value_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, nlohmann::detail::value_t, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   [ skipping 7 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, nlohmann::detail::value_t, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_complete_type<nlohmann::detail::nonesuch, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2731:56:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, nlohmann::detail::value_t>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = nlohmann::detail::value_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = nlohmann::detail::value_t; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = nlohmann::detail::value_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<nlohmann::detail::value_t, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::value_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<nlohmann::detail::value_t, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::value_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 8 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2592:8: error: base class 'struct std::integral_constant<bool, true>' has a non-virtual destructor [-Werror=effc++]
 struct is_complete_type<T, decltype(void(sizeof(T)))> : std::true_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, nlohmann::detail::value_t, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, nlohmann::detail::value_t>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = nlohmann::detail::value_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = nlohmann::detail::value_t; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = nlohmann::detail::value_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<nlohmann::detail::value_t, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::value_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<nlohmann::detail::value_t, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::value_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 8 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, nlohmann::detail::value_t>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = nlohmann::detail::value_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = nlohmann::detail::value_t; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = nlohmann::detail::value_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<nlohmann::detail::value_t, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::value_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<nlohmann::detail::value_t, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::value_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, nlohmann::detail::value_t, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   [ skipping 7 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, nlohmann::detail::value_t, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<std::nullptr_t>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::nullptr_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from 'struct std::__is_direct_constructible_impl<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_destructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, std::__is_direct_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:817:12:   required from 'struct std::__is_direct_constructible_new_safe<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:895:12:   required from 'struct std::__is_direct_constructible_new<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:903:12:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, std::nullptr_t, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, std::nullptr_t>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::nullptr_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::nullptr_t; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::nullptr_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::nullptr_t, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::nullptr_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::nullptr_t, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::nullptr_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 8 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, std::nullptr_t>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::nullptr_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::nullptr_t; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::nullptr_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::nullptr_t, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::nullptr_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::nullptr_t, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::nullptr_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::nullptr_t, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   [ skipping 7 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, std::nullptr_t, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, std::nullptr_t, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, std::nullptr_t>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::nullptr_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::nullptr_t; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::nullptr_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::nullptr_t, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::nullptr_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::nullptr_t, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::nullptr_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 8 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, std::nullptr_t>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::nullptr_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::nullptr_t; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::nullptr_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::nullptr_t, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::nullptr_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::nullptr_t, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::nullptr_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::nullptr_t, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   [ skipping 7 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, std::nullptr_t, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, std::nullptr_t, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, std::nullptr_t>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::nullptr_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::nullptr_t; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::nullptr_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::nullptr_t, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::nullptr_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::nullptr_t, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::nullptr_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 8 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, std::nullptr_t>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::nullptr_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::nullptr_t; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::nullptr_t]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::nullptr_t, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::nullptr_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::nullptr_t, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::nullptr_t&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::nullptr_t, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   [ skipping 7 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, std::nullptr_t, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_complete_type<nlohmann::basic_json<>, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2795:8:   required from 'struct nlohmann::detail::is_compatible_type<nlohmann::basic_json<>, nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:15842:55:   required from 'struct std::__is_direct_constructible_impl<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_destructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, std::__is_direct_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:817:12:   required from 'struct std::__is_direct_constructible_new_safe<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:895:12:   required from 'struct std::__is_direct_constructible_new<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:903:12:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2592:8: error: base class 'struct std::integral_constant<bool, true>' has a non-virtual destructor [-Werror=effc++]
 struct is_complete_type<T, decltype(void(sizeof(T)))> : std::true_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_compatible_type<nlohmann::basic_json<>, nlohmann::basic_json<> >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:15842:55:   required from 'struct std::__is_direct_constructible_impl<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_destructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, std::__is_direct_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:817:12:   required from 'struct std::__is_direct_constructible_new_safe<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:895:12:   required from 'struct std::__is_direct_constructible_new<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:903:12:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2795:8: error: base class 'struct nlohmann::detail::is_compatible_type_impl<nlohmann::basic_json<>, nlohmann::basic_json<>, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_compatible_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<nlohmann::basic_json<> >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required from 'constexpr const bool nlohmann::detail::is_compatible_type_impl<nlohmann::basic_json<>, nlohmann::basic_json<>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:15842:55:   required from 'struct std::__is_direct_constructible_impl<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_destructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, std::__is_direct_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:817:12:   required from 'struct std::__is_direct_constructible_new_safe<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:895:12:   required from 'struct std::__is_direct_constructible_new<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:903:12:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2479:8: error: base class 'struct std::integral_constant<bool, true>' has a non-virtual destructor [-Werror=effc++]
 struct is_basic_json<NLOHMANN_BASIC_JSON_TPL> : std::true_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::has_to_json<nlohmann::basic_json<>, nlohmann::basic_json<>, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2790:27:   required from 'constexpr const bool nlohmann::detail::is_compatible_type_impl<nlohmann::basic_json<>, nlohmann::basic_json<>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:15842:55:   required from 'struct std::__is_direct_constructible_impl<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_destructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, std::__is_direct_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:817:12:   required from 'struct std::__is_direct_constructible_new_safe<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:895:12:   required from 'struct std::__is_direct_constructible_new<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:903:12:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2551:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct has_to_json : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from 'struct std::__is_direct_constructible_impl<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_destructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, std::__is_direct_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:817:12:   required from 'struct std::__is_direct_constructible_new_safe<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:895:12:   required from 'struct std::__is_direct_constructible_new<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:903:12:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > > >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 8 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   [ skipping 7 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > > >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 8 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   [ skipping 7 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_complete_type<nlohmann::detail::json_ref<nlohmann::basic_json<> >, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2731:56:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > > >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 8 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2592:8: error: base class 'struct std::integral_constant<bool, true>' has a non-virtual destructor [-Werror=effc++]
 struct is_complete_type<T, decltype(void(sizeof(T)))> : std::true_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   [ skipping 7 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<nlohmann::detail::json_ref<nlohmann::basic_json<> > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required from 'constexpr const bool nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 8 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, nlohmann::detail::json_ref<nlohmann::basic_json<> >, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, nlohmann::detail::json_ref<nlohmann::basic_json<> > >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = nlohmann::detail::json_ref<nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = nlohmann::detail::json_ref<nlohmann::basic_json<> >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = nlohmann::detail::json_ref<nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<nlohmann::detail::json_ref<nlohmann::basic_json<> >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 14 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, nlohmann::detail::json_ref<nlohmann::basic_json<> > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = nlohmann::detail::json_ref<nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = nlohmann::detail::json_ref<nlohmann::basic_json<> >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = nlohmann::detail::json_ref<nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<nlohmann::detail::json_ref<nlohmann::basic_json<> >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, nlohmann::detail::json_ref<nlohmann::basic_json<> >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2744:62:   [ skipping 13 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, nlohmann::detail::json_ref<nlohmann::basic_json<> >, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, nlohmann::detail::json_ref<nlohmann::basic_json<> >, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, nlohmann::detail::json_ref<nlohmann::basic_json<> > >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = nlohmann::detail::json_ref<nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = nlohmann::detail::json_ref<nlohmann::basic_json<> >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = nlohmann::detail::json_ref<nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<nlohmann::detail::json_ref<nlohmann::basic_json<> >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 14 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, nlohmann::detail::json_ref<nlohmann::basic_json<> > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = nlohmann::detail::json_ref<nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = nlohmann::detail::json_ref<nlohmann::basic_json<> >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = nlohmann::detail::json_ref<nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<nlohmann::detail::json_ref<nlohmann::basic_json<> >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, nlohmann::detail::json_ref<nlohmann::basic_json<> >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2744:62:   [ skipping 13 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, nlohmann::detail::json_ref<nlohmann::basic_json<> >, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, nlohmann::detail::json_ref<nlohmann::basic_json<> >, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, nlohmann::detail::json_ref<nlohmann::basic_json<> > >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = nlohmann::detail::json_ref<nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = nlohmann::detail::json_ref<nlohmann::basic_json<> >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = nlohmann::detail::json_ref<nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<nlohmann::detail::json_ref<nlohmann::basic_json<> >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 14 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, nlohmann::detail::json_ref<nlohmann::basic_json<> > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = nlohmann::detail::json_ref<nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = nlohmann::detail::json_ref<nlohmann::basic_json<> >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = nlohmann::detail::json_ref<nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<nlohmann::detail::json_ref<nlohmann::basic_json<> >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, nlohmann::detail::json_ref<nlohmann::basic_json<> >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2744:62:   [ skipping 13 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, nlohmann::detail::json_ref<nlohmann::basic_json<> >, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::iterator_traits<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2501:42:   required by substitution of 'template<class T> using reference_t = typename T::reference [with T = nlohmann::detail::iterator_traits<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2364:76:   required by substitution of 'template<template<class ...> class Op, class ... Args> using is_detected = typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::value_t [with Op = nlohmann::detail::reference_t; Args = {nlohmann::detail::iterator_traits<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >, void>}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2582:57:   required from 'constexpr const auto nlohmann::detail::is_iterator_traits<nlohmann::detail::iterator_traits<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2578:27:   required from 'struct nlohmann::detail::is_iterator_traits<nlohmann::detail::iterator_traits<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>, void>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2741:9:   required from 'constexpr const bool nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   [ skipping 12 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2302:8: error: base class 'struct nlohmann::detail::iterator_types<std::initializer_list<nlohmann::detail::json_ref<nlohmann::basic_json<> > >, void>' has a non-virtual destructor [-Werror=effc++]
 struct iterator_traits < T, enable_if_t < !std::is_pointer<T>::value >>
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<const nlohmann::detail::json_ref<nlohmann::basic_json<> > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:17122:69:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = const nlohmann::detail::json_ref<nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from 'struct std::__is_direct_constructible_impl<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_destructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, std::__is_direct_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:817:12:   required from 'struct std::__is_direct_constructible_new_safe<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:895:12:   required from 'struct std::__is_direct_constructible_new<nlohmann::basic_json<>, nlohmann::basic_json<>&&>'
/usr/include/c++/4.8.2/type_traits:903:12:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/4.8.2/type_traits:955:12:   required from 'struct std::is_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:116:12:   required from 'struct std::__and_<std::is_constructible<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>, std::__is_nt_constructible_impl<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&> >'
/usr/include/c++/4.8.2/type_traits:1041:12:   required from 'struct std::is_nothrow_constructible<nlohmann::basic_json<>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&&>'
/usr/include/c++/4.8.2/type_traits:1072:12:   required from 'struct std::__is_nothrow_move_constructible_impl<nlohmann::basic_json<>, false>'
/usr/include/c++/4.8.2/type_traits:1078:12:   required from 'struct std::is_nothrow_move_constructible<nlohmann::basic_json<> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:22675:50:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<std::basic_string<char> >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, std::basic_string<char>, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, std::basic_string<char> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_string<char>; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_string<char>, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::basic_string<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, std::basic_string<char> >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_string<char>; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_string<char>, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::basic_string<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, std::basic_string<char>, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, std::basic_string<char> >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_string<char>; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_string<char>, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::basic_string<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, std::basic_string<char>, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_complete_type<char, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2731:56:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, std::basic_string<char> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_string<char>; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_string<char>, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::basic_string<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2592:8: error: base class 'struct std::integral_constant<bool, true>' has a non-virtual destructor [-Werror=effc++]
 struct is_complete_type<T, decltype(void(sizeof(T)))> : std::true_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, std::basic_string<char> >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_string<char>; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_string<char>, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::basic_string<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, std::basic_string<char>, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<char>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required from 'constexpr const bool nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, std::basic_string<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_string<char>; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_string<char>, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::basic_string<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, char, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, char>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = char; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<char, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<char, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 3 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_string<char>; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_string<char>, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::basic_string<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, char>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = char; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<char, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<char, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, char, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2744:62:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_string<char>; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_string<char>, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::basic_string<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, char, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, char, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, char>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = char; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<char, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<char, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 3 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_string<char>; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_string<char>, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::basic_string<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, char>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = char; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<char, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<char, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, char, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2744:62:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_string<char>; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_string<char>, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::basic_string<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, char, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, char, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, char>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = char; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<char, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<char, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 3 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_string<char>; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_string<char>, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::basic_string<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, char>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = char; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<char, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<char, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, char, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2744:62:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_string<char>; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_string<char>, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::basic_string<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, char, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::iterator_traits<std::basic_string<char>, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2501:42:   required by substitution of 'template<class T> using reference_t = typename T::reference [with T = nlohmann::detail::iterator_traits<std::basic_string<char>, void>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2364:76:   required by substitution of 'template<template<class ...> class Op, class ... Args> using is_detected = typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::value_t [with Op = nlohmann::detail::reference_t; Args = {nlohmann::detail::iterator_traits<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2582:57:   required from 'constexpr const auto nlohmann::detail::is_iterator_traits<nlohmann::detail::iterator_traits<std::basic_string<char>, void>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2578:27:   required from 'struct nlohmann::detail::is_iterator_traits<nlohmann::detail::iterator_traits<std::basic_string<char>, void>, void>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2741:9:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_string<char>; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_string<char>, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::basic_string<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_string<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2302:8: error: base class 'struct nlohmann::detail::iterator_types<std::basic_string<char>, void>' has a non-virtual destructor [-Werror=effc++]
 struct iterator_traits < T, enable_if_t < !std::is_pointer<T>::value >>
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::has_non_default_from_json<nlohmann::basic_json<>, nlohmann::basic_json<>, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2641:64:   required from 'constexpr const bool nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2536:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct has_non_default_from_json : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::has_from_json<nlohmann::basic_json<>, nlohmann::basic_json<>, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2641:64:   required from 'constexpr const bool nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2520:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct has_from_json : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > > >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_complete_type<std::pair<const std::basic_string<char>, nlohmann::basic_json<> >, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2731:56:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > > >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2592:8: error: base class 'struct std::integral_constant<bool, true>' has a non-virtual destructor [-Werror=effc++]
 struct is_complete_type<T, decltype(void(sizeof(T)))> : std::true_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required from 'constexpr const bool nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, std::pair<const std::basic_string<char>, nlohmann::basic_json<> >, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, std::pair<const std::basic_string<char>, nlohmann::basic_json<> > >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::pair<const std::basic_string<char>, nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::pair<const std::basic_string<char>, nlohmann::basic_json<> >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::pair<const std::basic_string<char>, nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::pair<const std::basic_string<char>, nlohmann::basic_json<> >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 3 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, std::pair<const std::basic_string<char>, nlohmann::basic_json<> > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::pair<const std::basic_string<char>, nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::pair<const std::basic_string<char>, nlohmann::basic_json<> >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::pair<const std::basic_string<char>, nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::pair<const std::basic_string<char>, nlohmann::basic_json<> >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::pair<const std::basic_string<char>, nlohmann::basic_json<> >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2744:62:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, std::pair<const std::basic_string<char>, nlohmann::basic_json<> >, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, std::pair<const std::basic_string<char>, nlohmann::basic_json<> >, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, std::pair<const std::basic_string<char>, nlohmann::basic_json<> > >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::pair<const std::basic_string<char>, nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::pair<const std::basic_string<char>, nlohmann::basic_json<> >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::pair<const std::basic_string<char>, nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::pair<const std::basic_string<char>, nlohmann::basic_json<> >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 3 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, std::pair<const std::basic_string<char>, nlohmann::basic_json<> > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::pair<const std::basic_string<char>, nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::pair<const std::basic_string<char>, nlohmann::basic_json<> >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::pair<const std::basic_string<char>, nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::pair<const std::basic_string<char>, nlohmann::basic_json<> >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::pair<const std::basic_string<char>, nlohmann::basic_json<> >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2744:62:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, std::pair<const std::basic_string<char>, nlohmann::basic_json<> >, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, std::pair<const std::basic_string<char>, nlohmann::basic_json<> >, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, std::pair<const std::basic_string<char>, nlohmann::basic_json<> > >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::pair<const std::basic_string<char>, nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::pair<const std::basic_string<char>, nlohmann::basic_json<> >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::pair<const std::basic_string<char>, nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::pair<const std::basic_string<char>, nlohmann::basic_json<> >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   [ skipping 3 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, std::pair<const std::basic_string<char>, nlohmann::basic_json<> > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::pair<const std::basic_string<char>, nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::pair<const std::basic_string<char>, nlohmann::basic_json<> >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::pair<const std::basic_string<char>, nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::pair<const std::basic_string<char>, nlohmann::basic_json<> >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::pair<const std::basic_string<char>, nlohmann::basic_json<> >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2744:62:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, std::pair<const std::basic_string<char>, nlohmann::basic_json<> >, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::iterator_traits<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2501:42:   required by substitution of 'template<class T> using reference_t = typename T::reference [with T = nlohmann::detail::iterator_traits<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2364:76:   required by substitution of 'template<template<class ...> class Op, class ... Args> using is_detected = typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::value_t [with Op = nlohmann::detail::reference_t; Args = {nlohmann::detail::iterator_traits<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >, void>}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2582:57:   required from 'constexpr const auto nlohmann::detail::is_iterator_traits<nlohmann::detail::iterator_traits<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2578:27:   required from 'struct nlohmann::detail::is_iterator_traits<nlohmann::detail::iterator_traits<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>, void>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2741:9:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2302:8: error: base class 'struct nlohmann::detail::iterator_types<std::map<std::basic_string<char>, nlohmann::basic_json<>, std::less<std::basic_string<char> >, std::allocator<std::pair<const std::basic_string<char>, nlohmann::basic_json<> > > >, void>' has a non-virtual destructor [-Werror=effc++]
 struct iterator_traits < T, enable_if_t < !std::is_pointer<T>::value >>
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > > >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::vector<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::vector<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::vector<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::vector<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::vector<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::vector<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > > >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::vector<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::vector<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::vector<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::vector<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::vector<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::vector<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::vector<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::vector<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::vector<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::iterator_traits<std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2501:42:   required by substitution of 'template<class T> using reference_t = typename T::reference [with T = nlohmann::detail::iterator_traits<std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2364:76:   required by substitution of 'template<template<class ...> class Op, class ... Args> using is_detected = typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::value_t [with Op = nlohmann::detail::reference_t; Args = {nlohmann::detail::iterator_traits<std::vector<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >, void>}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2582:57:   required from 'constexpr const auto nlohmann::detail::is_iterator_traits<nlohmann::detail::iterator_traits<std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2578:27:   required from 'struct nlohmann::detail::is_iterator_traits<nlohmann::detail::iterator_traits<std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>, void>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2741:9:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::vector<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::vector<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::vector<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2302:8: error: base class 'struct nlohmann::detail::iterator_types<std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >, void>' has a non-virtual destructor [-Werror=effc++]
 struct iterator_traits < T, enable_if_t < !std::is_pointer<T>::value >>
        ^
In file included from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:45:0,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/home/berenger/src/librascal/src/rascal/utils/utils.hh:59:51: error: 'std::enable_if_t' has not been declared
         template <bool C = IsOrderAvailable, std::enable_if_t<C, int> = 0>
                                                   ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:59:62: error: expected '>' before '<' token
         template <bool C = IsOrderAvailable, std::enable_if_t<C, int> = 0>
                                                              ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:64:51: error: 'std::enable_if_t' has not been declared
         template <bool C = IsOrderAvailable, std::enable_if_t<not(C), int> = 0>
                                                   ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:64:62: error: expected '>' before '<' token
         template <bool C = IsOrderAvailable, std::enable_if_t<not(C), int> = 0>
                                                              ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:65:31: error: 'template<long unsigned int TargetOrder, long unsigned int Order, long unsigned int ...Orders> template<bool C, int <anonymous> > static constexpr bool rascal::internal::details::IsOrderAvailableHelper<TargetOrder, Order, Orders>::get_is_order_available()' cannot be overloaded
         static constexpr bool get_is_order_available() {
                               ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:60:31: error: with 'template<long unsigned int TargetOrder, long unsigned int Order, long unsigned int ...Orders> template<bool C, int <anonymous> > static constexpr bool rascal::internal::details::IsOrderAvailableHelper<TargetOrder, Order, Orders>::get_is_order_available()'
         static constexpr bool get_is_order_available() {
                               ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:75:51: error: 'std::enable_if_t' has not been declared
         template <bool C = IsOrderAvailable, std::enable_if_t<C, int> = 0>
                                                   ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:75:62: error: expected '>' before '<' token
         template <bool C = IsOrderAvailable, std::enable_if_t<C, int> = 0>
                                                              ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:80:51: error: 'std::enable_if_t' has not been declared
         template <bool C = IsOrderAvailable, std::enable_if_t<not(C), int> = 0>
                                                   ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:80:62: error: expected '>' before '<' token
         template <bool C = IsOrderAvailable, std::enable_if_t<not(C), int> = 0>
                                                              ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:81:31: error: 'template<long unsigned int TargetOrder, long unsigned int Order> template<bool C, int <anonymous> > static constexpr bool rascal::internal::details::IsOrderAvailableHelper<TargetOrder, Order>::get_is_order_available()' cannot be overloaded
         static constexpr bool get_is_order_available() {
                               ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:76:31: error: with 'template<long unsigned int TargetOrder, long unsigned int Order> template<bool C, int <anonymous> > static constexpr bool rascal::internal::details::IsOrderAvailableHelper<TargetOrder, Order>::get_is_order_available()'
         static constexpr bool get_is_order_available() {
                               ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:92:29: error: template declaration of 'constexpr const bool rascal::internal::is_order_available'
     is_order_available(std::index_sequence<Orders...> /* sep*/) {
                             ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:92:24: error: 'index_sequence' is not a member of 'std'
     is_order_available(std::index_sequence<Orders...> /* sep*/) {
                        ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:92:24: note: suggested alternative:
In file included from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43:0,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/home/berenger/src/librascal/src/rascal/external/json.hpp:2199:8: note:   'nlohmann::detail::index_sequence'
 struct index_sequence
        ^
In file included from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:45:0,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/home/berenger/src/librascal/src/rascal/utils/utils.hh:102:39: error: template declaration of 'constexpr const size_t rascal::internal::get_last_element_in_sequence'
     get_last_element_in_sequence(std::index_sequence<Orders...> /* sep*/) {
                                       ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:102:34: error: 'index_sequence' is not a member of 'std'
     get_last_element_in_sequence(std::index_sequence<Orders...> /* sep*/) {
                                  ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:102:34: note: suggested alternative:
In file included from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43:0,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/home/berenger/src/librascal/src/rascal/external/json.hpp:2199:8: note:   'nlohmann::detail::index_sequence'
 struct index_sequence
        ^
In file included from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:45:0,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/home/berenger/src/librascal/src/rascal/utils/utils.hh:245:15: error: 'index_sequence' in namespace 'std' does not name a type
     constexpr std::index_sequence<N + Seq...>
               ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:252:9: error: 'add_to_sequence' was not declared in this scope
         add_to_sequence<Min>(std::make_index_sequence<Max - Min + 1>()));
         ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:252:9: error: 'add_to_sequence' was not declared in this scope
/home/berenger/src/librascal/src/rascal/utils/utils.hh:252:30: error: 'make_index_sequence' is not a member of 'std'
         add_to_sequence<Min>(std::make_index_sequence<Max - Min + 1>()));
                              ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:252:30: note: suggested alternative:
In file included from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43:0,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/home/berenger/src/librascal/src/rascal/external/json.hpp:2217:8: note:   'nlohmann::detail::make_index_sequence'
 struct make_index_sequence
        ^
In file included from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:45:0,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/home/berenger/src/librascal/src/rascal/utils/utils.hh:252:70: error: expected primary-expression before ')' token
         add_to_sequence<Min>(std::make_index_sequence<Max - Min + 1>()));
                                                                      ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:257:50: error: 'std::index_sequence' has not been declared
     constexpr auto index_apply_impl(F func, std::index_sequence<Is...>) {
                                                  ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:257:64: error: expected ',' or '...' before '<' token
     constexpr auto index_apply_impl(F func, std::index_sequence<Is...>) {
                                                                ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh: In function 'constexpr auto rascal::internal::index_apply(F)':
/home/berenger/src/librascal/src/rascal/utils/utils.hh:267:37: error: 'make_index_range' was not declared in this scope
       return index_apply_impl(func, make_index_range<Min, Max - 1>{});
                                     ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:267:67: error: expected primary-expression before '{' token
       return index_apply_impl(func, make_index_range<Min, Max - 1>{});
                                                                   ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh: In function 'constexpr auto rascal::internal::take_range(Tuple)':
/home/berenger/src/librascal/src/rascal/utils/utils.hh:277:23: error: expansion pattern 'auto' contains no argument packs
           [&](auto... Is) { return make_tuple(std::get<Is>(t)...); });
                       ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh: In lambda function:
/home/berenger/src/librascal/src/rascal/utils/utils.hh:277:56: error: 'Is' was not declared in this scope
           [&](auto... Is) { return make_tuple(std::get<Is>(t)...); });
                                                        ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:277:62: error: expansion pattern 'get<<expression error> >(t)' contains no argument packs
           [&](auto... Is) { return make_tuple(std::get<Is>(t)...); });
                                                              ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:277:65: error: there are no arguments to 'make_tuple' that depend on a template parameter, so a declaration of 'make_tuple' must be available [-fpermissive]
           [&](auto... Is) { return make_tuple(std::get<Is>(t)...); });
                                                                 ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:277:65: note: (if you use '-fpermissive', G++ will accept your code, but allowing the use of an undeclared name is deprecated)
/home/berenger/src/librascal/src/rascal/utils/utils.hh: In function 'constexpr auto rascal::internal::apply(F, Tuple)':
/home/berenger/src/librascal/src/rascal/utils/utils.hh:286:23: error: expansion pattern 'auto' contains no argument packs
           [&](auto... Is) { return func(std::get<Is>(t)...); });
                       ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh: In lambda function:
/home/berenger/src/librascal/src/rascal/utils/utils.hh:286:50: error: 'Is' was not declared in this scope
           [&](auto... Is) { return func(std::get<Is>(t)...); });
                                                  ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:286:56: error: expansion pattern 'get<<expression error> >(t)' contains no argument packs
           [&](auto... Is) { return func(std::get<Is>(t)...); });
                                                        ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh: At global scope:
/home/berenger/src/librascal/src/rascal/utils/utils.hh:307:49: error: 'std::index_sequence' has not been declared
     inline void for_each_helper(Func && f, std::index_sequence<Indices...>,
                                                 ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:307:63: error: expected ',' or '...' before '<' token
     inline void for_each_helper(Func && f, std::index_sequence<Indices...>,
                                                               ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh: In function 'void rascal::internal::for_each_helper(Func&&, int)':
/home/berenger/src/librascal/src/rascal/utils/utils.hh:310:58: error: 'tup' was not declared in this scope
                     std::forward<Args>(std::get<Indices>(tup))...);
                                                          ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh: In function 'void rascal::internal::for_each(std::tuple<_Elements ...>&, Func&&)':
/home/berenger/src/librascal/src/rascal/utils/utils.hh:320:46: error: 'index_sequence_for' is not a member of 'std'
       for_each_helper(std::forward<Func>(f), std::index_sequence_for<Args...>{},
                                              ^
/home/berenger/src/librascal/src/rascal/utils/utils.hh:320:46: note: suggested alternative:
In file included from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43:0,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/home/berenger/src/librascal/src/rascal/external/json.hpp:2225:62: note:   'nlohmann::detail::index_sequence_for'
 using index_sequence_for = make_index_sequence<sizeof...(Ts)>;
                                                              ^
In file included from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:45:0,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/home/berenger/src/librascal/src/rascal/utils/utils.hh:320:74: error: expected primary-expression before '...' token
       for_each_helper(std::forward<Func>(f), std::index_sequence_for<Args...>{},
                                                                          ^
In file included from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43:0,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<const std::pair<const std::basic_string<char>, nlohmann::basic_json<> > >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:17122:69:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = const std::pair<const std::basic_string<char>, nlohmann::basic_json<> >]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/utils/json_io.cc: In function 'json rascal::json_io::load(const string&)':
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:21: error: no match for 'operator==' (operand types are 'std::initializer_list<std::basic_string<char> >' and 'const char [5]')
       if (extension == "json") {
                     ^
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:21: note: candidates are:
In file included from /home/berenger/src/librascal/build/external/Eigen3/Eigen/Core:80:0,
                 from /home/berenger/src/librascal/build/external/Eigen3/Eigen/Dense:1,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:47,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/complex:466:5: note: template<class _Tp> constexpr bool std::operator==(const _Tp&, const std::complex<_Tp>&)
     operator==(const _Tp& __x, const complex<_Tp>& __y)
     ^
/usr/include/c++/4.8.2/complex:466:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   mismatched types 'const std::complex<_Tp>' and 'const char [5]'
       if (extension == "json") {
                        ^
In file included from /home/berenger/src/librascal/build/external/Eigen3/Eigen/Core:80:0,
                 from /home/berenger/src/librascal/build/external/Eigen3/Eigen/Dense:1,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:47,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/complex:461:5: note: template<class _Tp> constexpr bool std::operator==(const std::complex<_Tp>&, const _Tp&)
     operator==(const complex<_Tp>& __x, const _Tp& __y)
     ^
/usr/include/c++/4.8.2/complex:461:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::complex<_Tp>'
       if (extension == "json") {
                        ^
In file included from /home/berenger/src/librascal/build/external/Eigen3/Eigen/Core:80:0,
                 from /home/berenger/src/librascal/build/external/Eigen3/Eigen/Dense:1,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:47,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/complex:456:5: note: template<class _Tp> constexpr bool std::operator==(const std::complex<_Tp>&, const std::complex<_Tp>&)
     operator==(const complex<_Tp>& __x, const complex<_Tp>& __y)
     ^
/usr/include/c++/4.8.2/complex:456:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::complex<_Tp>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/set:62:0,
                 from /home/berenger/src/librascal/src/rascal/utils/utils.hh:31,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_multiset.h:739:5: note: template<class _Key, class _Compare, class _Alloc> bool std::operator==(const std::multiset<_Key, _Compare, _Alloc>&, const std::multiset<_Key, _Compare, _Alloc>&)
     operator==(const multiset<_Key, _Compare, _Alloc>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_multiset.h:739:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::multiset<_Key, _Compare, _Alloc>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/set:61:0,
                 from /home/berenger/src/librascal/src/rascal/utils/utils.hh:31,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_set.h:754:5: note: template<class _Key, class _Compare, class _Alloc> bool std::operator==(const std::set<_Key, _Compare, _Alloc>&, const std::set<_Key, _Compare, _Alloc>&)
     operator==(const set<_Key, _Compare, _Alloc>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_set.h:754:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::set<_Key, _Compare, _Alloc>'
       if (extension == "json") {
                        ^
In file included from /home/berenger/src/librascal/src/rascal/external/json.hpp:70:0,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/valarray:1179:1: note: template<class _Tp> std::_Expr<std::_BinClos<std::__equal_to, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__equal_to, _Tp>::result_type> std::operator==(const _Tp&, const std::valarray<_Tp>&)
 _DEFINE_BINARY_OPERATOR(==, __equal_to)
 ^
/usr/include/c++/4.8.2/valarray:1179:1: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   mismatched types 'const std::valarray<_Tp>' and 'const char [5]'
       if (extension == "json") {
                        ^
In file included from /home/berenger/src/librascal/src/rascal/external/json.hpp:70:0,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/valarray:1179:1: note: template<class _Tp> std::_Expr<std::_BinClos<std::__equal_to, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__equal_to, _Tp>::result_type> std::operator==(const std::valarray<_Tp>&, const _Tp&)
 _DEFINE_BINARY_OPERATOR(==, __equal_to)
 ^
/usr/include/c++/4.8.2/valarray:1179:1: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::valarray<_Tp>'
       if (extension == "json") {
                        ^
In file included from /home/berenger/src/librascal/src/rascal/external/json.hpp:70:0,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/valarray:1179:1: note: template<class _Tp> std::_Expr<std::_BinClos<std::__equal_to, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__equal_to, _Tp>::result_type> std::operator==(const std::valarray<_Tp>&, const std::valarray<_Tp>&)
 _DEFINE_BINARY_OPERATOR(==, __equal_to)
 ^
/usr/include/c++/4.8.2/valarray:1179:1: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::valarray<_Tp>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/valarray:587:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:70,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note: template<class _Dom> std::_Expr<std::_BinClos<std::__equal_to, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__equal_to, typename _Dom1::value_type>::result_type> std::operator==(const std::valarray<typename _Dom::value_type>&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(==, __equal_to)
     ^
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::valarray<typename _Dom::value_type>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/valarray:587:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:70,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note: template<class _Dom> std::_Expr<std::_BinClos<std::__equal_to, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__equal_to, typename _Dom1::value_type>::result_type> std::operator==(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::valarray<typename _Dom::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(==, __equal_to)
     ^
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/valarray:587:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:70,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note: template<class _Dom> std::_Expr<std::_BinClos<std::__equal_to, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__equal_to, typename _Dom1::value_type>::result_type> std::operator==(const typename _Dom::value_type&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(==, __equal_to)
     ^
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'const char [5]'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/valarray:587:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:70,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note: template<class _Dom> std::_Expr<std::_BinClos<std::__equal_to, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__equal_to, typename _Dom1::value_type>::result_type> std::operator==(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)
     _DEFINE_EXPR_BINARY_OPERATOR(==, __equal_to)
     ^
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/valarray:587:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:70,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note: template<class _Dom1, class _Dom2> std::_Expr<std::_BinClos<std::__equal_to, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__equal_to, typename _Dom1::value_type>::result_type> std::operator==(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::_Expr<_Dom2, typename _Dom2::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(==, __equal_to)
     ^
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/unordered_map:48:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:68,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/unordered_map.h:1400:5: note: template<class _Key, class _Tp, class _Hash, class _Pred, class _Alloc> bool std::operator==(const std::unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>&, const std::unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>&)
     operator==(const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
     ^
/usr/include/c++/4.8.2/bits/unordered_map.h:1400:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/unordered_map:48:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:68,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/unordered_map.h:1388:5: note: template<class _Key, class _Tp, class _Hash, class _Pred, class _Alloc> bool std::operator==(const std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>&, const std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>&)
     operator==(const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
     ^
/usr/include/c++/4.8.2/bits/unordered_map.h:1388:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/map:62:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:64,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_multimap.h:864:5: note: template<class _Key, class _Tp, class _Compare, class _Alloc> bool std::operator==(const std::multimap<_Key, _Tp, _Compare, _Alloc>&, const std::multimap<_Key, _Tp, _Compare, _Alloc>&)
     operator==(const multimap<_Key, _Tp, _Compare, _Alloc>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_multimap.h:864:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::multimap<_Key, _Tp, _Compare, _Alloc>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/map:61:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:64,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_map.h:962:5: note: template<class _Key, class _Tp, class _Compare, class _Alloc> bool std::operator==(const std::map<_Key, _Tp, _Compare, _Alloc>&, const std::map<_Key, _Tp, _Compare, _Alloc>&)
     operator==(const map<_Key, _Tp, _Compare, _Alloc>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_map.h:962:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::map<_Key, _Tp, _Compare, _Alloc>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/map:60:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:64,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_tree.h:907:5: note: template<class _Key, class _Val, class _KeyOfValue, class _Compare, class _Alloc> bool std::operator==(const std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>&, const std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>&)
     operator==(const _Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_tree.h:907:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/map:60:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:64,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_tree.h:310:5: note: template<class _Val> bool std::operator==(const std::_Rb_tree_iterator<_Tp>&, const std::_Rb_tree_const_iterator<_Val>&)
     operator==(const _Rb_tree_iterator<_Val>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_tree.h:310:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::_Rb_tree_iterator<_Tp>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/forward_list:40:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:62,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/forward_list.tcc:387:5: note: template<class _Tp, class _Alloc> bool std::operator==(const std::forward_list<_Tp, _Alloc>&, const std::forward_list<_Tp, _Alloc>&)
     operator==(const forward_list<_Tp, _Alloc>& __lx,
     ^
/usr/include/c++/4.8.2/bits/forward_list.tcc:387:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::forward_list<_Tp, _Alloc>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/forward_list:38:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:62,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/forward_list.h:258:5: note: template<class _Tp> bool std::operator==(const std::_Fwd_list_iterator<_Tp>&, const std::_Fwd_list_const_iterator<_Tp>&)
     operator==(const _Fwd_list_iterator<_Tp>& __x,
     ^
/usr/include/c++/4.8.2/bits/forward_list.h:258:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::_Fwd_list_iterator<_Tp>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/memory:82:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/shared_ptr.h:338:5: note: template<class _Tp> bool std::operator==(std::nullptr_t, const std::shared_ptr<_Tp1>&)
     operator==(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
     ^
/usr/include/c++/4.8.2/bits/shared_ptr.h:338:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   cannot convert 'extension' (type 'std::initializer_list<std::basic_string<char> >') to type 'std::nullptr_t'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/memory:82:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/shared_ptr.h:333:5: note: template<class _Tp> bool std::operator==(const std::shared_ptr<_Tp1>&, std::nullptr_t)
     operator==(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
     ^
/usr/include/c++/4.8.2/bits/shared_ptr.h:333:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::shared_ptr<_Tp1>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/memory:82:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/shared_ptr.h:327:5: note: template<class _Tp1, class _Tp2> bool std::operator==(const std::shared_ptr<_Tp1>&, const std::shared_ptr<_Tp2>&)
     operator==(const shared_ptr<_Tp1>& __a,
     ^
/usr/include/c++/4.8.2/bits/shared_ptr.h:327:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::shared_ptr<_Tp1>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/bits/shared_ptr.h:52:0,
                 from /usr/include/c++/4.8.2/memory:82,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/shared_ptr_base.h:1040:5: note: template<class _Tp, __gnu_cxx::_Lock_policy _Lp> bool std::operator==(std::nullptr_t, const std::__shared_ptr<_Tp, _Lp>&)
     operator==(nullptr_t, const __shared_ptr<_Tp, _Lp>& __a) noexcept
     ^
/usr/include/c++/4.8.2/bits/shared_ptr_base.h:1040:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   cannot convert 'extension' (type 'std::initializer_list<std::basic_string<char> >') to type 'std::nullptr_t'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/bits/shared_ptr.h:52:0,
                 from /usr/include/c++/4.8.2/memory:82,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/shared_ptr_base.h:1035:5: note: template<class _Tp, __gnu_cxx::_Lock_policy _Lp> bool std::operator==(const std::__shared_ptr<_Tp, _Lp>&, std::nullptr_t)
     operator==(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept
     ^
/usr/include/c++/4.8.2/bits/shared_ptr_base.h:1035:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::__shared_ptr<_Tp, _Lp>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/bits/shared_ptr.h:52:0,
                 from /usr/include/c++/4.8.2/memory:82,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/shared_ptr_base.h:1029:5: note: template<class _Tp1, class _Tp2, __gnu_cxx::_Lock_policy _Lp> bool std::operator==(const std::__shared_ptr<_Tp1, _Lp>&, const std::__shared_ptr<_Tp2, _Lp>&)
     operator==(const __shared_ptr<_Tp1, _Lp>& __a,
     ^
/usr/include/c++/4.8.2/bits/shared_ptr_base.h:1029:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::__shared_ptr<_Tp1, _Lp>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/memory:81:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/unique_ptr.h:500:5: note: template<class _Tp, class _Dp> bool std::operator==(std::nullptr_t, const std::unique_ptr<_Tp, _Dp>&)
     operator==(nullptr_t, const unique_ptr<_Tp, _Dp>& __x) noexcept
     ^
/usr/include/c++/4.8.2/bits/unique_ptr.h:500:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   cannot convert 'extension' (type 'std::initializer_list<std::basic_string<char> >') to type 'std::nullptr_t'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/memory:81:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/unique_ptr.h:495:5: note: template<class _Tp, class _Dp> bool std::operator==(const std::unique_ptr<_Tp, _Dp>&, std::nullptr_t)
     operator==(const unique_ptr<_Tp, _Dp>& __x, nullptr_t) noexcept
     ^
/usr/include/c++/4.8.2/bits/unique_ptr.h:495:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::unique_ptr<_Tp, _Dp>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/memory:81:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/unique_ptr.h:489:5: note: template<class _Tp, class _Dp, class _Up, class _Ep> bool std::operator==(const std::unique_ptr<_Tp, _Dp>&, const std::unique_ptr<_Up, _Ep>&)
     operator==(const unique_ptr<_Tp, _Dp>& __x,
     ^
/usr/include/c++/4.8.2/bits/unique_ptr.h:489:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::unique_ptr<_Tp, _Dp>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/iterator:66:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:44,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stream_iterator.h:130:5: note: template<class _Tp, class _CharT, class _Traits, class _Dist> bool std::operator==(const std::istream_iterator<_Tp, _CharT, _Traits, _Dist>&, const std::istream_iterator<_Tp, _CharT, _Traits, _Dist>&)
     operator==(const istream_iterator<_Tp, _CharT, _Traits, _Dist>& __x,
     ^
/usr/include/c++/4.8.2/bits/stream_iterator.h:130:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::istream_iterator<_Tp, _CharT, _Traits, _Dist>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/bits/locale_facets.h:48:0,
                 from /usr/include/c++/4.8.2/bits/basic_ios.h:37,
                 from /usr/include/c++/4.8.2/ios:44,
                 from /usr/include/c++/4.8.2/ostream:38,
                 from /usr/include/c++/4.8.2/iterator:64,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:44,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/streambuf_iterator.h:204:5: note: template<class _CharT, class _Traits> bool std::operator==(const std::istreambuf_iterator<_CharT, _Traits>&, const std::istreambuf_iterator<_CharT, _Traits>&)
     operator==(const istreambuf_iterator<_CharT, _Traits>& __a,
     ^
/usr/include/c++/4.8.2/bits/streambuf_iterator.h:204:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::istreambuf_iterator<_CharT, _Traits>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/bits/stl_algo.h:66:0,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/functional:2543:5: note: template<class _Res, class ... _Args> bool std::operator==(std::nullptr_t, const std::function<_Res(_ArgTypes ...)>&)
     operator==(nullptr_t, const function<_Res(_Args...)>& __f) noexcept
     ^
/usr/include/c++/4.8.2/functional:2543:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   cannot convert 'extension' (type 'std::initializer_list<std::basic_string<char> >') to type 'std::nullptr_t'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/bits/stl_algo.h:66:0,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/functional:2537:5: note: template<class _Res, class ... _Args> bool std::operator==(const std::function<_Res(_ArgTypes ...)>&, std::nullptr_t)
     operator==(const function<_Res(_Args...)>& __f, nullptr_t) noexcept
     ^
/usr/include/c++/4.8.2/functional:2537:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::function<_Res(_ArgTypes ...)>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/functional:55:0,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:66,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/tuple:813:5: note: template<class ... _TElements, class ... _UElements> constexpr bool std::operator==(const std::tuple<_Elements ...>&, const std::tuple<_Elements ...>&)
     operator==(const tuple<_TElements...>& __t,
     ^
/usr/include/c++/4.8.2/tuple:813:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::tuple<_Elements ...>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/tuple:39:0,
                 from /usr/include/c++/4.8.2/functional:55,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:66,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/array:228:5: note: template<class _Tp, long unsigned int _Nm> bool std::operator==(const std::array<_Tp, _Nm>&, const std::array<_Tp, _Nm>&)
     operator==(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two)
     ^
/usr/include/c++/4.8.2/array:228:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::array<_Tp, _Nm>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/random:52:0,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/random.tcc:2030:5: note: template<class _RealType1> bool std::operator==(const std::normal_distribution<_RealType>&, const std::normal_distribution<_RealType>&)
     operator==(const std::normal_distribution<_RealType>& __d1,
     ^
/usr/include/c++/4.8.2/bits/random.tcc:2030:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::normal_distribution<_RealType>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/vector:64:0,
                 from /usr/include/c++/4.8.2/bits/random.h:34,
                 from /usr/include/c++/4.8.2/random:50,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_vector.h:1404:5: note: template<class _Tp, class _Alloc> bool std::operator==(const std::vector<_Tp, _Alloc>&, const std::vector<_Tp, _Alloc>&)
     operator==(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y)
     ^
/usr/include/c++/4.8.2/bits/stl_vector.h:1404:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::vector<_Tp, _Alloc>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/string:52:0,
                 from /usr/include/c++/4.8.2/random:41,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/basic_string.h:2519:5: note: template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const std::basic_string<_CharT, _Traits, _Alloc>&, const _CharT*)
     operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^
/usr/include/c++/4.8.2/bits/basic_string.h:2519:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::basic_string<_CharT, _Traits, _Alloc>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/string:52:0,
                 from /usr/include/c++/4.8.2/random:41,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/basic_string.h:2507:5: note: template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const _CharT*, const std::basic_string<_CharT, _Traits, _Alloc>&)
     operator==(const _CharT* __lhs,
     ^
/usr/include/c++/4.8.2/bits/basic_string.h:2507:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   mismatched types 'const _CharT*' and 'std::initializer_list<std::basic_string<char> >'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/string:52:0,
                 from /usr/include/c++/4.8.2/random:41,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/basic_string.h:2493:5: note: template<class _CharT> typename __gnu_cxx::__enable_if<std::__is_char<_Tp>::__value, bool>::__type std::operator==(const std::basic_string<_CharT>&, const std::basic_string<_CharT>&)
     operator==(const basic_string<_CharT>& __lhs,
     ^
/usr/include/c++/4.8.2/bits/basic_string.h:2493:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::basic_string<_CharT>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/string:52:0,
                 from /usr/include/c++/4.8.2/random:41,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/basic_string.h:2486:5: note: template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const std::basic_string<_CharT, _Traits, _Alloc>&, const std::basic_string<_CharT, _Traits, _Alloc>&)
     operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^
/usr/include/c++/4.8.2/bits/basic_string.h:2486:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::basic_string<_CharT, _Traits, _Alloc>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/string:41:0,
                 from /usr/include/c++/4.8.2/random:41,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/allocator.h:133:5: note: template<class _Tp> bool std::operator==(const std::allocator<_Tp>&, const std::allocator<_Tp>&)
     operator==(const allocator<_Tp>&, const allocator<_Tp>&)
     ^
/usr/include/c++/4.8.2/bits/allocator.h:133:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::allocator<_Tp>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/string:41:0,
                 from /usr/include/c++/4.8.2/random:41,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/allocator.h:128:5: note: template<class _T1, class _T2> bool std::operator==(const std::allocator<_Tp>&, const std::allocator<_Tp>&)
     operator==(const allocator<_T1>&, const allocator<_T2>&)
     ^
/usr/include/c++/4.8.2/bits/allocator.h:128:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::allocator<_Tp>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/bits/char_traits.h:40:0,
                 from /usr/include/c++/4.8.2/string:40,
                 from /usr/include/c++/4.8.2/random:41,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/postypes.h:216:5: note: template<class _StateT> bool std::operator==(const std::fpos<_StateT>&, const std::fpos<_StateT>&)
     operator==(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs)
     ^
/usr/include/c++/4.8.2/bits/postypes.h:216:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::fpos<_StateT>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/4.8.2/algorithm:61,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_iterator.h:1037:5: note: template<class _Iterator> bool std::operator==(const std::move_iterator<_Iterator>&, const std::move_iterator<_Iterator>&)
     operator==(const move_iterator<_Iterator>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_iterator.h:1037:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::move_iterator<_Iterator>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/4.8.2/algorithm:61,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_iterator.h:1031:5: note: template<class _IteratorL, class _IteratorR> bool std::operator==(const std::move_iterator<_Iterator>&, const std::move_iterator<_IteratorR>&)
     operator==(const move_iterator<_IteratorL>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_iterator.h:1031:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::move_iterator<_Iterator>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/4.8.2/algorithm:61,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_iterator.h:341:5: note: template<class _IteratorL, class _IteratorR> bool std::operator==(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_IteratorR>&)
     operator==(const reverse_iterator<_IteratorL>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_iterator.h:341:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::reverse_iterator<_Iterator>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/4.8.2/algorithm:61,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_iterator.h:291:5: note: template<class _Iterator> bool std::operator==(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_Iterator>&)
     operator==(const reverse_iterator<_Iterator>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_iterator.h:291:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::reverse_iterator<_Iterator>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/utility:70:0,
                 from /usr/include/c++/4.8.2/algorithm:60,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_pair.h:214:5: note: template<class _T1, class _T2> constexpr bool std::operator==(const std::pair<_T1, _T2>&, const std::pair<_T1, _T2>&)
     operator==(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
     ^
/usr/include/c++/4.8.2/bits/stl_pair.h:214:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::pair<_T1, _T2>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/x86_64-redhat-linux/bits/c++allocator.h:33:0,
                 from /usr/include/c++/4.8.2/bits/allocator.h:46,
                 from /usr/include/c++/4.8.2/string:41,
                 from /usr/include/c++/4.8.2/random:41,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/ext/new_allocator.h:139:5: note: template<class _Tp> bool __gnu_cxx::operator==(const __gnu_cxx::new_allocator<_Tp>&, const __gnu_cxx::new_allocator<_Tp>&)
     operator==(const new_allocator<_Tp>&, const new_allocator<_Tp>&)
     ^
/usr/include/c++/4.8.2/ext/new_allocator.h:139:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const __gnu_cxx::new_allocator<_Tp>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/4.8.2/algorithm:61,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_iterator.h:811:5: note: template<class _Iterator, class _Container> bool __gnu_cxx::operator==(const __gnu_cxx::__normal_iterator<_Iterator, _Container>&, const __gnu_cxx::__normal_iterator<_Iterator, _Container>&)
     operator==(const __normal_iterator<_Iterator, _Container>& __lhs,
     ^
/usr/include/c++/4.8.2/bits/stl_iterator.h:811:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const __gnu_cxx::__normal_iterator<_Iterator, _Container>'
       if (extension == "json") {
                        ^
In file included from /usr/include/c++/4.8.2/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/4.8.2/algorithm:61,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_iterator.h:805:5: note: template<class _IteratorL, class _IteratorR, class _Container> bool __gnu_cxx::operator==(const __gnu_cxx::__normal_iterator<_IteratorL, _Container>&, const __gnu_cxx::__normal_iterator<_IteratorR, _Container>&)
     operator==(const __normal_iterator<_IteratorL, _Container>& __lhs,
     ^
/usr/include/c++/4.8.2/bits/stl_iterator.h:805:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:35:24: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const __gnu_cxx::__normal_iterator<_IteratorL, _Container>'
       if (extension == "json") {
                        ^
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:28: error: no match for 'operator==' (operand types are 'std::initializer_list<std::basic_string<char> >' and 'const char [7]')
       } else if (extension == "ubjson") {
                            ^
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:28: note: candidates are:
In file included from /home/berenger/src/librascal/build/external/Eigen3/Eigen/Core:80:0,
                 from /home/berenger/src/librascal/build/external/Eigen3/Eigen/Dense:1,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:47,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/complex:466:5: note: template<class _Tp> constexpr bool std::operator==(const _Tp&, const std::complex<_Tp>&)
     operator==(const _Tp& __x, const complex<_Tp>& __y)
     ^
/usr/include/c++/4.8.2/complex:466:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   mismatched types 'const std::complex<_Tp>' and 'const char [7]'
       } else if (extension == "ubjson") {
                               ^
In file included from /home/berenger/src/librascal/build/external/Eigen3/Eigen/Core:80:0,
                 from /home/berenger/src/librascal/build/external/Eigen3/Eigen/Dense:1,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:47,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/complex:461:5: note: template<class _Tp> constexpr bool std::operator==(const std::complex<_Tp>&, const _Tp&)
     operator==(const complex<_Tp>& __x, const _Tp& __y)
     ^
/usr/include/c++/4.8.2/complex:461:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::complex<_Tp>'
       } else if (extension == "ubjson") {
                               ^
In file included from /home/berenger/src/librascal/build/external/Eigen3/Eigen/Core:80:0,
                 from /home/berenger/src/librascal/build/external/Eigen3/Eigen/Dense:1,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:47,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/complex:456:5: note: template<class _Tp> constexpr bool std::operator==(const std::complex<_Tp>&, const std::complex<_Tp>&)
     operator==(const complex<_Tp>& __x, const complex<_Tp>& __y)
     ^
/usr/include/c++/4.8.2/complex:456:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::complex<_Tp>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/set:62:0,
                 from /home/berenger/src/librascal/src/rascal/utils/utils.hh:31,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_multiset.h:739:5: note: template<class _Key, class _Compare, class _Alloc> bool std::operator==(const std::multiset<_Key, _Compare, _Alloc>&, const std::multiset<_Key, _Compare, _Alloc>&)
     operator==(const multiset<_Key, _Compare, _Alloc>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_multiset.h:739:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::multiset<_Key, _Compare, _Alloc>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/set:61:0,
                 from /home/berenger/src/librascal/src/rascal/utils/utils.hh:31,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_set.h:754:5: note: template<class _Key, class _Compare, class _Alloc> bool std::operator==(const std::set<_Key, _Compare, _Alloc>&, const std::set<_Key, _Compare, _Alloc>&)
     operator==(const set<_Key, _Compare, _Alloc>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_set.h:754:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::set<_Key, _Compare, _Alloc>'
       } else if (extension == "ubjson") {
                               ^
In file included from /home/berenger/src/librascal/src/rascal/external/json.hpp:70:0,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/valarray:1179:1: note: template<class _Tp> std::_Expr<std::_BinClos<std::__equal_to, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__equal_to, _Tp>::result_type> std::operator==(const _Tp&, const std::valarray<_Tp>&)
 _DEFINE_BINARY_OPERATOR(==, __equal_to)
 ^
/usr/include/c++/4.8.2/valarray:1179:1: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   mismatched types 'const std::valarray<_Tp>' and 'const char [7]'
       } else if (extension == "ubjson") {
                               ^
In file included from /home/berenger/src/librascal/src/rascal/external/json.hpp:70:0,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/valarray:1179:1: note: template<class _Tp> std::_Expr<std::_BinClos<std::__equal_to, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__equal_to, _Tp>::result_type> std::operator==(const std::valarray<_Tp>&, const _Tp&)
 _DEFINE_BINARY_OPERATOR(==, __equal_to)
 ^
/usr/include/c++/4.8.2/valarray:1179:1: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::valarray<_Tp>'
       } else if (extension == "ubjson") {
                               ^
In file included from /home/berenger/src/librascal/src/rascal/external/json.hpp:70:0,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/valarray:1179:1: note: template<class _Tp> std::_Expr<std::_BinClos<std::__equal_to, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__equal_to, _Tp>::result_type> std::operator==(const std::valarray<_Tp>&, const std::valarray<_Tp>&)
 _DEFINE_BINARY_OPERATOR(==, __equal_to)
 ^
/usr/include/c++/4.8.2/valarray:1179:1: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::valarray<_Tp>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/valarray:587:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:70,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note: template<class _Dom> std::_Expr<std::_BinClos<std::__equal_to, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__equal_to, typename _Dom1::value_type>::result_type> std::operator==(const std::valarray<typename _Dom::value_type>&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(==, __equal_to)
     ^
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::valarray<typename _Dom::value_type>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/valarray:587:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:70,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note: template<class _Dom> std::_Expr<std::_BinClos<std::__equal_to, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__equal_to, typename _Dom1::value_type>::result_type> std::operator==(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::valarray<typename _Dom::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(==, __equal_to)
     ^
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/valarray:587:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:70,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note: template<class _Dom> std::_Expr<std::_BinClos<std::__equal_to, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__equal_to, typename _Dom1::value_type>::result_type> std::operator==(const typename _Dom::value_type&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(==, __equal_to)
     ^
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'const char [7]'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/valarray:587:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:70,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note: template<class _Dom> std::_Expr<std::_BinClos<std::__equal_to, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__equal_to, typename _Dom1::value_type>::result_type> std::operator==(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)
     _DEFINE_EXPR_BINARY_OPERATOR(==, __equal_to)
     ^
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/valarray:587:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:70,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note: template<class _Dom1, class _Dom2> std::_Expr<std::_BinClos<std::__equal_to, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__equal_to, typename _Dom1::value_type>::result_type> std::operator==(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::_Expr<_Dom2, typename _Dom2::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(==, __equal_to)
     ^
/usr/include/c++/4.8.2/bits/valarray_after.h:414:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/unordered_map:48:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:68,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/unordered_map.h:1400:5: note: template<class _Key, class _Tp, class _Hash, class _Pred, class _Alloc> bool std::operator==(const std::unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>&, const std::unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>&)
     operator==(const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
     ^
/usr/include/c++/4.8.2/bits/unordered_map.h:1400:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/unordered_map:48:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:68,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/unordered_map.h:1388:5: note: template<class _Key, class _Tp, class _Hash, class _Pred, class _Alloc> bool std::operator==(const std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>&, const std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>&)
     operator==(const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
     ^
/usr/include/c++/4.8.2/bits/unordered_map.h:1388:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/map:62:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:64,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_multimap.h:864:5: note: template<class _Key, class _Tp, class _Compare, class _Alloc> bool std::operator==(const std::multimap<_Key, _Tp, _Compare, _Alloc>&, const std::multimap<_Key, _Tp, _Compare, _Alloc>&)
     operator==(const multimap<_Key, _Tp, _Compare, _Alloc>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_multimap.h:864:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::multimap<_Key, _Tp, _Compare, _Alloc>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/map:61:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:64,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_map.h:962:5: note: template<class _Key, class _Tp, class _Compare, class _Alloc> bool std::operator==(const std::map<_Key, _Tp, _Compare, _Alloc>&, const std::map<_Key, _Tp, _Compare, _Alloc>&)
     operator==(const map<_Key, _Tp, _Compare, _Alloc>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_map.h:962:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::map<_Key, _Tp, _Compare, _Alloc>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/map:60:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:64,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_tree.h:907:5: note: template<class _Key, class _Val, class _KeyOfValue, class _Compare, class _Alloc> bool std::operator==(const std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>&, const std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>&)
     operator==(const _Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_tree.h:907:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/map:60:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:64,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_tree.h:310:5: note: template<class _Val> bool std::operator==(const std::_Rb_tree_iterator<_Tp>&, const std::_Rb_tree_const_iterator<_Val>&)
     operator==(const _Rb_tree_iterator<_Val>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_tree.h:310:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::_Rb_tree_iterator<_Tp>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/forward_list:40:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:62,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/forward_list.tcc:387:5: note: template<class _Tp, class _Alloc> bool std::operator==(const std::forward_list<_Tp, _Alloc>&, const std::forward_list<_Tp, _Alloc>&)
     operator==(const forward_list<_Tp, _Alloc>& __lx,
     ^
/usr/include/c++/4.8.2/bits/forward_list.tcc:387:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::forward_list<_Tp, _Alloc>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/forward_list:38:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:62,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/forward_list.h:258:5: note: template<class _Tp> bool std::operator==(const std::_Fwd_list_iterator<_Tp>&, const std::_Fwd_list_const_iterator<_Tp>&)
     operator==(const _Fwd_list_iterator<_Tp>& __x,
     ^
/usr/include/c++/4.8.2/bits/forward_list.h:258:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::_Fwd_list_iterator<_Tp>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/memory:82:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/shared_ptr.h:338:5: note: template<class _Tp> bool std::operator==(std::nullptr_t, const std::shared_ptr<_Tp1>&)
     operator==(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
     ^
/usr/include/c++/4.8.2/bits/shared_ptr.h:338:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   cannot convert 'extension' (type 'std::initializer_list<std::basic_string<char> >') to type 'std::nullptr_t'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/memory:82:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/shared_ptr.h:333:5: note: template<class _Tp> bool std::operator==(const std::shared_ptr<_Tp1>&, std::nullptr_t)
     operator==(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
     ^
/usr/include/c++/4.8.2/bits/shared_ptr.h:333:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::shared_ptr<_Tp1>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/memory:82:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/shared_ptr.h:327:5: note: template<class _Tp1, class _Tp2> bool std::operator==(const std::shared_ptr<_Tp1>&, const std::shared_ptr<_Tp2>&)
     operator==(const shared_ptr<_Tp1>& __a,
     ^
/usr/include/c++/4.8.2/bits/shared_ptr.h:327:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::shared_ptr<_Tp1>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/bits/shared_ptr.h:52:0,
                 from /usr/include/c++/4.8.2/memory:82,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/shared_ptr_base.h:1040:5: note: template<class _Tp, __gnu_cxx::_Lock_policy _Lp> bool std::operator==(std::nullptr_t, const std::__shared_ptr<_Tp, _Lp>&)
     operator==(nullptr_t, const __shared_ptr<_Tp, _Lp>& __a) noexcept
     ^
/usr/include/c++/4.8.2/bits/shared_ptr_base.h:1040:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   cannot convert 'extension' (type 'std::initializer_list<std::basic_string<char> >') to type 'std::nullptr_t'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/bits/shared_ptr.h:52:0,
                 from /usr/include/c++/4.8.2/memory:82,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/shared_ptr_base.h:1035:5: note: template<class _Tp, __gnu_cxx::_Lock_policy _Lp> bool std::operator==(const std::__shared_ptr<_Tp, _Lp>&, std::nullptr_t)
     operator==(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept
     ^
/usr/include/c++/4.8.2/bits/shared_ptr_base.h:1035:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::__shared_ptr<_Tp, _Lp>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/bits/shared_ptr.h:52:0,
                 from /usr/include/c++/4.8.2/memory:82,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/shared_ptr_base.h:1029:5: note: template<class _Tp1, class _Tp2, __gnu_cxx::_Lock_policy _Lp> bool std::operator==(const std::__shared_ptr<_Tp1, _Lp>&, const std::__shared_ptr<_Tp2, _Lp>&)
     operator==(const __shared_ptr<_Tp1, _Lp>& __a,
     ^
/usr/include/c++/4.8.2/bits/shared_ptr_base.h:1029:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::__shared_ptr<_Tp1, _Lp>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/memory:81:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/unique_ptr.h:500:5: note: template<class _Tp, class _Dp> bool std::operator==(std::nullptr_t, const std::unique_ptr<_Tp, _Dp>&)
     operator==(nullptr_t, const unique_ptr<_Tp, _Dp>& __x) noexcept
     ^
/usr/include/c++/4.8.2/bits/unique_ptr.h:500:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   cannot convert 'extension' (type 'std::initializer_list<std::basic_string<char> >') to type 'std::nullptr_t'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/memory:81:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/unique_ptr.h:495:5: note: template<class _Tp, class _Dp> bool std::operator==(const std::unique_ptr<_Tp, _Dp>&, std::nullptr_t)
     operator==(const unique_ptr<_Tp, _Dp>& __x, nullptr_t) noexcept
     ^
/usr/include/c++/4.8.2/bits/unique_ptr.h:495:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::unique_ptr<_Tp, _Dp>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/memory:81:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:45,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/unique_ptr.h:489:5: note: template<class _Tp, class _Dp, class _Up, class _Ep> bool std::operator==(const std::unique_ptr<_Tp, _Dp>&, const std::unique_ptr<_Up, _Ep>&)
     operator==(const unique_ptr<_Tp, _Dp>& __x,
     ^
/usr/include/c++/4.8.2/bits/unique_ptr.h:489:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::unique_ptr<_Tp, _Dp>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/iterator:66:0,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:44,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stream_iterator.h:130:5: note: template<class _Tp, class _CharT, class _Traits, class _Dist> bool std::operator==(const std::istream_iterator<_Tp, _CharT, _Traits, _Dist>&, const std::istream_iterator<_Tp, _CharT, _Traits, _Dist>&)
     operator==(const istream_iterator<_Tp, _CharT, _Traits, _Dist>& __x,
     ^
/usr/include/c++/4.8.2/bits/stream_iterator.h:130:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::istream_iterator<_Tp, _CharT, _Traits, _Dist>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/bits/locale_facets.h:48:0,
                 from /usr/include/c++/4.8.2/bits/basic_ios.h:37,
                 from /usr/include/c++/4.8.2/ios:44,
                 from /usr/include/c++/4.8.2/ostream:38,
                 from /usr/include/c++/4.8.2/iterator:64,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:44,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/streambuf_iterator.h:204:5: note: template<class _CharT, class _Traits> bool std::operator==(const std::istreambuf_iterator<_CharT, _Traits>&, const std::istreambuf_iterator<_CharT, _Traits>&)
     operator==(const istreambuf_iterator<_CharT, _Traits>& __a,
     ^
/usr/include/c++/4.8.2/bits/streambuf_iterator.h:204:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::istreambuf_iterator<_CharT, _Traits>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/bits/stl_algo.h:66:0,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/functional:2543:5: note: template<class _Res, class ... _Args> bool std::operator==(std::nullptr_t, const std::function<_Res(_ArgTypes ...)>&)
     operator==(nullptr_t, const function<_Res(_Args...)>& __f) noexcept
     ^
/usr/include/c++/4.8.2/functional:2543:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   cannot convert 'extension' (type 'std::initializer_list<std::basic_string<char> >') to type 'std::nullptr_t'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/bits/stl_algo.h:66:0,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/functional:2537:5: note: template<class _Res, class ... _Args> bool std::operator==(const std::function<_Res(_ArgTypes ...)>&, std::nullptr_t)
     operator==(const function<_Res(_Args...)>& __f, nullptr_t) noexcept
     ^
/usr/include/c++/4.8.2/functional:2537:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::function<_Res(_ArgTypes ...)>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/functional:55:0,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:66,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/tuple:813:5: note: template<class ... _TElements, class ... _UElements> constexpr bool std::operator==(const std::tuple<_Elements ...>&, const std::tuple<_Elements ...>&)
     operator==(const tuple<_TElements...>& __t,
     ^
/usr/include/c++/4.8.2/tuple:813:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::tuple<_Elements ...>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/tuple:39:0,
                 from /usr/include/c++/4.8.2/functional:55,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:66,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/array:228:5: note: template<class _Tp, long unsigned int _Nm> bool std::operator==(const std::array<_Tp, _Nm>&, const std::array<_Tp, _Nm>&)
     operator==(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two)
     ^
/usr/include/c++/4.8.2/array:228:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::array<_Tp, _Nm>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/random:52:0,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/random.tcc:2030:5: note: template<class _RealType1> bool std::operator==(const std::normal_distribution<_RealType>&, const std::normal_distribution<_RealType>&)
     operator==(const std::normal_distribution<_RealType>& __d1,
     ^
/usr/include/c++/4.8.2/bits/random.tcc:2030:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::normal_distribution<_RealType>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/vector:64:0,
                 from /usr/include/c++/4.8.2/bits/random.h:34,
                 from /usr/include/c++/4.8.2/random:50,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_vector.h:1404:5: note: template<class _Tp, class _Alloc> bool std::operator==(const std::vector<_Tp, _Alloc>&, const std::vector<_Tp, _Alloc>&)
     operator==(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y)
     ^
/usr/include/c++/4.8.2/bits/stl_vector.h:1404:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::vector<_Tp, _Alloc>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/string:52:0,
                 from /usr/include/c++/4.8.2/random:41,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/basic_string.h:2519:5: note: template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const std::basic_string<_CharT, _Traits, _Alloc>&, const _CharT*)
     operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^
/usr/include/c++/4.8.2/bits/basic_string.h:2519:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::basic_string<_CharT, _Traits, _Alloc>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/string:52:0,
                 from /usr/include/c++/4.8.2/random:41,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/basic_string.h:2507:5: note: template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const _CharT*, const std::basic_string<_CharT, _Traits, _Alloc>&)
     operator==(const _CharT* __lhs,
     ^
/usr/include/c++/4.8.2/bits/basic_string.h:2507:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   mismatched types 'const _CharT*' and 'std::initializer_list<std::basic_string<char> >'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/string:52:0,
                 from /usr/include/c++/4.8.2/random:41,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/basic_string.h:2493:5: note: template<class _CharT> typename __gnu_cxx::__enable_if<std::__is_char<_Tp>::__value, bool>::__type std::operator==(const std::basic_string<_CharT>&, const std::basic_string<_CharT>&)
     operator==(const basic_string<_CharT>& __lhs,
     ^
/usr/include/c++/4.8.2/bits/basic_string.h:2493:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::basic_string<_CharT>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/string:52:0,
                 from /usr/include/c++/4.8.2/random:41,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/basic_string.h:2486:5: note: template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const std::basic_string<_CharT, _Traits, _Alloc>&, const std::basic_string<_CharT, _Traits, _Alloc>&)
     operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^
/usr/include/c++/4.8.2/bits/basic_string.h:2486:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::basic_string<_CharT, _Traits, _Alloc>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/string:41:0,
                 from /usr/include/c++/4.8.2/random:41,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/allocator.h:133:5: note: template<class _Tp> bool std::operator==(const std::allocator<_Tp>&, const std::allocator<_Tp>&)
     operator==(const allocator<_Tp>&, const allocator<_Tp>&)
     ^
/usr/include/c++/4.8.2/bits/allocator.h:133:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::allocator<_Tp>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/string:41:0,
                 from /usr/include/c++/4.8.2/random:41,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/allocator.h:128:5: note: template<class _T1, class _T2> bool std::operator==(const std::allocator<_Tp>&, const std::allocator<_Tp>&)
     operator==(const allocator<_T1>&, const allocator<_T2>&)
     ^
/usr/include/c++/4.8.2/bits/allocator.h:128:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::allocator<_Tp>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/bits/char_traits.h:40:0,
                 from /usr/include/c++/4.8.2/string:40,
                 from /usr/include/c++/4.8.2/random:41,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/postypes.h:216:5: note: template<class _StateT> bool std::operator==(const std::fpos<_StateT>&, const std::fpos<_StateT>&)
     operator==(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs)
     ^
/usr/include/c++/4.8.2/bits/postypes.h:216:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::fpos<_StateT>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/4.8.2/algorithm:61,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_iterator.h:1037:5: note: template<class _Iterator> bool std::operator==(const std::move_iterator<_Iterator>&, const std::move_iterator<_Iterator>&)
     operator==(const move_iterator<_Iterator>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_iterator.h:1037:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::move_iterator<_Iterator>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/4.8.2/algorithm:61,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_iterator.h:1031:5: note: template<class _IteratorL, class _IteratorR> bool std::operator==(const std::move_iterator<_Iterator>&, const std::move_iterator<_IteratorR>&)
     operator==(const move_iterator<_IteratorL>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_iterator.h:1031:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::move_iterator<_Iterator>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/4.8.2/algorithm:61,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_iterator.h:341:5: note: template<class _IteratorL, class _IteratorR> bool std::operator==(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_IteratorR>&)
     operator==(const reverse_iterator<_IteratorL>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_iterator.h:341:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::reverse_iterator<_Iterator>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/4.8.2/algorithm:61,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_iterator.h:291:5: note: template<class _Iterator> bool std::operator==(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_Iterator>&)
     operator==(const reverse_iterator<_Iterator>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_iterator.h:291:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::reverse_iterator<_Iterator>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/utility:70:0,
                 from /usr/include/c++/4.8.2/algorithm:60,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_pair.h:214:5: note: template<class _T1, class _T2> constexpr bool std::operator==(const std::pair<_T1, _T2>&, const std::pair<_T1, _T2>&)
     operator==(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
     ^
/usr/include/c++/4.8.2/bits/stl_pair.h:214:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const std::pair<_T1, _T2>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/x86_64-redhat-linux/bits/c++allocator.h:33:0,
                 from /usr/include/c++/4.8.2/bits/allocator.h:46,
                 from /usr/include/c++/4.8.2/string:41,
                 from /usr/include/c++/4.8.2/random:41,
                 from /usr/include/c++/4.8.2/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8.2/algorithm:62,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/ext/new_allocator.h:139:5: note: template<class _Tp> bool __gnu_cxx::operator==(const __gnu_cxx::new_allocator<_Tp>&, const __gnu_cxx::new_allocator<_Tp>&)
     operator==(const new_allocator<_Tp>&, const new_allocator<_Tp>&)
     ^
/usr/include/c++/4.8.2/ext/new_allocator.h:139:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const __gnu_cxx::new_allocator<_Tp>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/4.8.2/algorithm:61,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_iterator.h:811:5: note: template<class _Iterator, class _Container> bool __gnu_cxx::operator==(const __gnu_cxx::__normal_iterator<_Iterator, _Container>&, const __gnu_cxx::__normal_iterator<_Iterator, _Container>&)
     operator==(const __normal_iterator<_Iterator, _Container>& __lhs,
     ^
/usr/include/c++/4.8.2/bits/stl_iterator.h:811:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const __gnu_cxx::__normal_iterator<_Iterator, _Container>'
       } else if (extension == "ubjson") {
                               ^
In file included from /usr/include/c++/4.8.2/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/4.8.2/algorithm:61,
                 from /home/berenger/src/librascal/src/rascal/external/json.hpp:37,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/usr/include/c++/4.8.2/bits/stl_iterator.h:805:5: note: template<class _IteratorL, class _IteratorR, class _Container> bool __gnu_cxx::operator==(const __gnu_cxx::__normal_iterator<_IteratorL, _Container>&, const __gnu_cxx::__normal_iterator<_IteratorR, _Container>&)
     operator==(const __normal_iterator<_IteratorL, _Container>& __lhs,
     ^
/usr/include/c++/4.8.2/bits/stl_iterator.h:805:5: note:   template argument deduction/substitution failed:
/home/berenger/src/librascal/src/rascal/utils/json_io.cc:37:31: note:   'std::initializer_list<std::basic_string<char> >' is not derived from 'const __gnu_cxx::__normal_iterator<_IteratorL, _Container>'
       } else if (extension == "ubjson") {
                               ^
In file included from /home/berenger/src/librascal/src/rascal/utils/json_io.hh:43:0,
                 from /home/berenger/src/librascal/src/rascal/utils/json_io.cc:27:
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_complete_type<std::basic_ifstream<char>, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2795:8:   required from 'struct nlohmann::detail::is_compatible_type<nlohmann::basic_json<>, std::basic_ifstream<char> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:15842:55:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2592:8: error: base class 'struct std::integral_constant<bool, true>' has a non-virtual destructor [-Werror=effc++]
 struct is_complete_type<T, decltype(void(sizeof(T)))> : std::true_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_compatible_type<nlohmann::basic_json<>, std::basic_ifstream<char> >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:15842:55:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2795:8: error: base class 'struct nlohmann::detail::is_compatible_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_compatible_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<std::basic_ifstream<char> >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required from 'constexpr const bool nlohmann::detail::is_compatible_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:15842:55:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_tuple<nlohmann::basic_json<>, std::basic_ifstream<char> >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3769:115:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::to_json(j, forward<T>(val)), void())) nlohmann::detail::to_json_fn::operator()(BasicJsonType&, T&&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3829:68:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::to_json(j, forward<ValueType>(val)), void())) nlohmann::adl_serializer<T, SFINAE>::to_json(BasicJsonType&, ValueType&&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_ifstream<char>; <template-parameter-1-2> = void] [with BasicJsonType = nlohmann::basic_json<>; ValueType = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2510:69:   required by substitution of 'template<class T, class ... Args> using to_json_function = decltype (T:: to_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_ifstream<char>, void>; Args = {nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::to_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_ifstream<char, std::char_traits<char> >, void>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2558:27:   required from 'constexpr const bool nlohmann::detail::has_to_json<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2790:27:   required from 'constexpr const bool nlohmann::detail::is_compatible_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:15842:55:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2806:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_tuple : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_compatible_object_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2616:8:   required from 'struct nlohmann::detail::is_compatible_object_type<nlohmann::basic_json<>, std::basic_ifstream<char> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3727:92:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::to_json(j, forward<T>(val)), void())) nlohmann::detail::to_json_fn::operator()(BasicJsonType&, T&&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3829:68:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::to_json(j, forward<ValueType>(val)), void())) nlohmann::adl_serializer<T, SFINAE>::to_json(BasicJsonType&, ValueType&&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_ifstream<char>; <template-parameter-1-2> = void] [with BasicJsonType = nlohmann::basic_json<>; ValueType = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2510:69:   required by substitution of 'template<class T, class ... Args> using to_json_function = decltype (T:: to_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_ifstream<char>, void>; Args = {nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::to_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_ifstream<char, std::char_traits<char> >, void>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2558:27:   required from 'constexpr const bool nlohmann::detail::has_to_json<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2790:27:   required from 'constexpr const bool nlohmann::detail::is_compatible_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:15842:55:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2596:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_compatible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_compatible_object_type<nlohmann::basic_json<>, std::basic_ifstream<char> >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3727:92:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::to_json(j, forward<T>(val)), void())) nlohmann::detail::to_json_fn::operator()(BasicJsonType&, T&&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3829:68:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::to_json(j, forward<ValueType>(val)), void())) nlohmann::adl_serializer<T, SFINAE>::to_json(BasicJsonType&, ValueType&&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_ifstream<char>; <template-parameter-1-2> = void] [with BasicJsonType = nlohmann::basic_json<>; ValueType = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2510:69:   required by substitution of 'template<class T, class ... Args> using to_json_function = decltype (T:: to_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_ifstream<char>, void>; Args = {nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::to_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_ifstream<char, std::char_traits<char> >, void>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2558:27:   required from 'constexpr const bool nlohmann::detail::has_to_json<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2790:27:   required from 'constexpr const bool nlohmann::detail::is_compatible_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:15842:55:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2616:8: error: base class 'struct nlohmann::detail::is_compatible_object_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_compatible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_compatible_string_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2667:8:   required from 'struct nlohmann::detail::is_compatible_string_type<nlohmann::basic_json<>, std::basic_ifstream<char> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3705:23:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::to_json(j, forward<T>(val)), void())) nlohmann::detail::to_json_fn::operator()(BasicJsonType&, T&&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3829:68:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::to_json(j, forward<ValueType>(val)), void())) nlohmann::adl_serializer<T, SFINAE>::to_json(BasicJsonType&, ValueType&&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_ifstream<char>; <template-parameter-1-2> = void] [with BasicJsonType = nlohmann::basic_json<>; ValueType = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2510:69:   required by substitution of 'template<class T, class ... Args> using to_json_function = decltype (T:: to_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_ifstream<char>, void>; Args = {nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::to_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_ifstream<char, std::char_traits<char> >, void>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2558:27:   required from 'constexpr const bool nlohmann::detail::has_to_json<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2790:27:   required from 'constexpr const bool nlohmann::detail::is_compatible_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:15842:55:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2654:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_compatible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_compatible_string_type<nlohmann::basic_json<>, std::basic_ifstream<char> >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3705:23:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::to_json(j, forward<T>(val)), void())) nlohmann::detail::to_json_fn::operator()(BasicJsonType&, T&&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3829:68:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::to_json(j, forward<ValueType>(val)), void())) nlohmann::adl_serializer<T, SFINAE>::to_json(BasicJsonType&, ValueType&&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_ifstream<char>; <template-parameter-1-2> = void] [with BasicJsonType = nlohmann::basic_json<>; ValueType = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2510:69:   required by substitution of 'template<class T, class ... Args> using to_json_function = decltype (T:: to_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_ifstream<char>, void>; Args = {nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::to_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_ifstream<char, std::char_traits<char> >, void>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2558:27:   required from 'constexpr const bool nlohmann::detail::has_to_json<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2790:27:   required from 'constexpr const bool nlohmann::detail::is_compatible_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:15842:55:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2667:8: error: base class 'struct nlohmann::detail::is_compatible_string_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_compatible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::iterator_traits<std::basic_ifstream<char>, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2501:42:   required by substitution of 'template<class T> using reference_t = typename T::reference [with T = nlohmann::detail::iterator_traits<std::basic_ifstream<char>, void>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2364:76:   required by substitution of 'template<template<class ...> class Op, class ... Args> using is_detected = typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::value_t [with Op = nlohmann::detail::reference_t; Args = {nlohmann::detail::iterator_traits<std::basic_ifstream<char, std::char_traits<char> >, void>}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2582:57:   required from 'constexpr const auto nlohmann::detail::is_iterator_traits<nlohmann::detail::iterator_traits<std::basic_ifstream<char>, void>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2578:27:   required from 'struct nlohmann::detail::is_iterator_traits<nlohmann::detail::iterator_traits<std::basic_ifstream<char>, void>, void>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2700:5:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/home/berenger/src/librascal/src/rascal/external/json.hpp:3829:68:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::to_json(j, forward<ValueType>(val)), void())) nlohmann::adl_serializer<T, SFINAE>::to_json(BasicJsonType&, ValueType&&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_ifstream<char>; <template-parameter-1-2> = void] [with BasicJsonType = nlohmann::basic_json<>; ValueType = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2510:69:   required by substitution of 'template<class T, class ... Args> using to_json_function = decltype (T:: to_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_ifstream<char>, void>; Args = {nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::to_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_ifstream<char, std::char_traits<char> >, void>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2558:27:   required from 'constexpr const bool nlohmann::detail::has_to_json<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2790:27:   required from 'constexpr const bool nlohmann::detail::is_compatible_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:15842:55:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2302:8: error: base class 'struct nlohmann::detail::iterator_types<std::basic_ifstream<char>, void>' has a non-virtual destructor [-Werror=effc++]
 struct iterator_traits < T, enable_if_t < !std::is_pointer<T>::value >>
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_compatible_array_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2709:8:   required from 'struct nlohmann::detail::is_compatible_array_type<nlohmann::basic_json<>, std::basic_ifstream<char> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3702:51:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::to_json(j, forward<T>(val)), void())) nlohmann::detail::to_json_fn::operator()(BasicJsonType&, T&&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3829:68:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::to_json(j, forward<ValueType>(val)), void())) nlohmann::adl_serializer<T, SFINAE>::to_json(BasicJsonType&, ValueType&&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_ifstream<char>; <template-parameter-1-2> = void] [with BasicJsonType = nlohmann::basic_json<>; ValueType = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2510:69:   required by substitution of 'template<class T, class ... Args> using to_json_function = decltype (T:: to_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_ifstream<char>, void>; Args = {nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::to_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_ifstream<char, std::char_traits<char> >, void>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2558:27:   required from 'constexpr const bool nlohmann::detail::has_to_json<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2790:27:   required from 'constexpr const bool nlohmann::detail::is_compatible_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:15842:55:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2690:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_compatible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_compatible_array_type<nlohmann::basic_json<>, std::basic_ifstream<char> >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3702:51:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::to_json(j, forward<T>(val)), void())) nlohmann::detail::to_json_fn::operator()(BasicJsonType&, T&&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3829:68:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::to_json(j, forward<ValueType>(val)), void())) nlohmann::adl_serializer<T, SFINAE>::to_json(BasicJsonType&, ValueType&&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_ifstream<char>; <template-parameter-1-2> = void] [with BasicJsonType = nlohmann::basic_json<>; ValueType = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2510:69:   required by substitution of 'template<class T, class ... Args> using to_json_function = decltype (T:: to_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_ifstream<char>, void>; Args = {nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::to_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_ifstream<char, std::char_traits<char> >, void>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2558:27:   required from 'constexpr const bool nlohmann::detail::has_to_json<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2790:27:   required from 'constexpr const bool nlohmann::detail::is_compatible_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:15842:55:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2709:8: error: base class 'struct nlohmann::detail::is_compatible_array_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_compatible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_compatible_integer_type_impl<long int, std::basic_ifstream<char>, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2778:8:   required from 'struct nlohmann::detail::is_compatible_integer_type<long int, std::basic_ifstream<char> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3680:135:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::to_json(j, forward<T>(val)), void())) nlohmann::detail::to_json_fn::operator()(BasicJsonType&, T&&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3829:68:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::to_json(j, forward<ValueType>(val)), void())) nlohmann::adl_serializer<T, SFINAE>::to_json(BasicJsonType&, ValueType&&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_ifstream<char>; <template-parameter-1-2> = void] [with BasicJsonType = nlohmann::basic_json<>; ValueType = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2510:69:   required by substitution of 'template<class T, class ... Args> using to_json_function = decltype (T:: to_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_ifstream<char>, void>; Args = {nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::to_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_ifstream<char, std::char_traits<char> >, void>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2558:27:   required from 'constexpr const bool nlohmann::detail::has_to_json<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2790:27:   required from 'constexpr const bool nlohmann::detail::is_compatible_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:15842:55:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2757:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_compatible_integer_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_compatible_integer_type<long int, std::basic_ifstream<char> >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3680:135:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::to_json(j, forward<T>(val)), void())) nlohmann::detail::to_json_fn::operator()(BasicJsonType&, T&&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3829:68:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::to_json(j, forward<ValueType>(val)), void())) nlohmann::adl_serializer<T, SFINAE>::to_json(BasicJsonType&, ValueType&&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_ifstream<char>; <template-parameter-1-2> = void] [with BasicJsonType = nlohmann::basic_json<>; ValueType = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2510:69:   required by substitution of 'template<class T, class ... Args> using to_json_function = decltype (T:: to_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_ifstream<char>, void>; Args = {nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::to_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_ifstream<char, std::char_traits<char> >, void>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2558:27:   required from 'constexpr const bool nlohmann::detail::has_to_json<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2790:27:   required from 'constexpr const bool nlohmann::detail::is_compatible_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:15842:55:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2778:8: error: base class 'struct nlohmann::detail::is_compatible_integer_type_impl<long int, std::basic_ifstream<char>, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_compatible_integer_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_compatible_integer_type_impl<long unsigned int, std::basic_ifstream<char>, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2778:8:   required from 'struct nlohmann::detail::is_compatible_integer_type<long unsigned int, std::basic_ifstream<char> >'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3673:137:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::to_json(j, forward<T>(val)), void())) nlohmann::detail::to_json_fn::operator()(BasicJsonType&, T&&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3829:68:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::to_json(j, forward<ValueType>(val)), void())) nlohmann::adl_serializer<T, SFINAE>::to_json(BasicJsonType&, ValueType&&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_ifstream<char>; <template-parameter-1-2> = void] [with BasicJsonType = nlohmann::basic_json<>; ValueType = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2510:69:   required by substitution of 'template<class T, class ... Args> using to_json_function = decltype (T:: to_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_ifstream<char>, void>; Args = {nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::to_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_ifstream<char, std::char_traits<char> >, void>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2558:27:   required from 'constexpr const bool nlohmann::detail::has_to_json<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2790:27:   required from 'constexpr const bool nlohmann::detail::is_compatible_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:15842:55:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2757:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_compatible_integer_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_compatible_integer_type<long unsigned int, std::basic_ifstream<char> >':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3673:137:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::to_json(j, forward<T>(val)), void())) nlohmann::detail::to_json_fn::operator()(BasicJsonType&, T&&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3829:68:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::to_json(j, forward<ValueType>(val)), void())) nlohmann::adl_serializer<T, SFINAE>::to_json(BasicJsonType&, ValueType&&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_ifstream<char>; <template-parameter-1-2> = void] [with BasicJsonType = nlohmann::basic_json<>; ValueType = std::basic_ifstream<char>]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2510:69:   required by substitution of 'template<class T, class ... Args> using to_json_function = decltype (T:: to_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_ifstream<char>, void>; Args = {nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::to_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_ifstream<char, std::char_traits<char> >, void>, nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_ifstream<char, std::char_traits<char> >}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2558:27:   required from 'constexpr const bool nlohmann::detail::has_to_json<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2790:27:   required from 'constexpr const bool nlohmann::detail::is_compatible_type_impl<nlohmann::basic_json<>, std::basic_ifstream<char>, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:15842:55:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2778:8: error: base class 'struct nlohmann::detail::is_compatible_integer_type_impl<long unsigned int, std::basic_ifstream<char>, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_compatible_integer_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<std::bernoulli_distribution>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::bernoulli_distribution]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, std::bernoulli_distribution, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, std::bernoulli_distribution>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::bernoulli_distribution]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::bernoulli_distribution; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::bernoulli_distribution]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::bernoulli_distribution, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::bernoulli_distribution&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::bernoulli_distribution, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::bernoulli_distribution&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::bernoulli_distribution, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::bernoulli_distribution]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, std::bernoulli_distribution>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::bernoulli_distribution]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::bernoulli_distribution; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::bernoulli_distribution]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::bernoulli_distribution, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::bernoulli_distribution&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::bernoulli_distribution, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::bernoulli_distribution&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::bernoulli_distribution, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::bernoulli_distribution]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, std::bernoulli_distribution, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, std::bernoulli_distribution, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, std::bernoulli_distribution>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::bernoulli_distribution]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::bernoulli_distribution; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::bernoulli_distribution]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::bernoulli_distribution, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::bernoulli_distribution&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::bernoulli_distribution, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::bernoulli_distribution&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::bernoulli_distribution, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::bernoulli_distribution]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, std::bernoulli_distribution>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::bernoulli_distribution]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::bernoulli_distribution; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::bernoulli_distribution]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::bernoulli_distribution, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::bernoulli_distribution&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::bernoulli_distribution, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::bernoulli_distribution&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::bernoulli_distribution, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::bernoulli_distribution]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, std::bernoulli_distribution, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, std::bernoulli_distribution, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, std::bernoulli_distribution>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::bernoulli_distribution]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::bernoulli_distribution; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::bernoulli_distribution]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::bernoulli_distribution, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::bernoulli_distribution&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::bernoulli_distribution, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::bernoulli_distribution&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::bernoulli_distribution, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::bernoulli_distribution]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, std::bernoulli_distribution>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::bernoulli_distribution]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::bernoulli_distribution; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::bernoulli_distribution]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::bernoulli_distribution, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::bernoulli_distribution&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::bernoulli_distribution, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::bernoulli_distribution&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::bernoulli_distribution, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::bernoulli_distribution]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, std::bernoulli_distribution, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<unsigned char>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, unsigned char, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, unsigned char>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = unsigned char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = unsigned char; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = unsigned char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<unsigned char, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<unsigned char, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, unsigned char, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, unsigned char>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = unsigned char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = unsigned char; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = unsigned char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<unsigned char, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<unsigned char, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, unsigned char, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, unsigned char, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, unsigned char, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, unsigned char>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = unsigned char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = unsigned char; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = unsigned char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<unsigned char, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<unsigned char, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, unsigned char, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, unsigned char>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = unsigned char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = unsigned char; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = unsigned char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<unsigned char, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<unsigned char, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, unsigned char, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, unsigned char, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, unsigned char, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, unsigned char>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = unsigned char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = unsigned char; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = unsigned char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<unsigned char, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<unsigned char, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, unsigned char, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, unsigned char>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = unsigned char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = unsigned char; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = unsigned char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<unsigned char, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<unsigned char, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, unsigned char, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, unsigned char, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<signed char>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = signed char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, signed char, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, signed char>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = signed char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = signed char; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = signed char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<signed char, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<signed char, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, signed char, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = signed char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, signed char>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = signed char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = signed char; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = signed char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<signed char, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<signed char, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, signed char, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = signed char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, signed char, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, signed char, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, signed char>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = signed char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = signed char; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = signed char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<signed char, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<signed char, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, signed char, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = signed char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, signed char>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = signed char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = signed char; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = signed char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<signed char, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<signed char, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, signed char, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = signed char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, signed char, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, signed char, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, signed char>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = signed char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = signed char; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = signed char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<signed char, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<signed char, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, signed char, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = signed char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, signed char>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = signed char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = signed char; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = signed char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<signed char, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<signed char, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, signed char, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = signed char]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, signed char, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<unsigned char*>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, unsigned char*, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, unsigned char*>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = unsigned char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = unsigned char*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = unsigned char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<unsigned char*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<unsigned char*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, unsigned char*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, unsigned char*>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = unsigned char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = unsigned char*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = unsigned char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<unsigned char*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<unsigned char*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, unsigned char*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, unsigned char*, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, unsigned char*, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, unsigned char*>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = unsigned char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = unsigned char*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = unsigned char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<unsigned char*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<unsigned char*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, unsigned char*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, unsigned char*>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = unsigned char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = unsigned char*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = unsigned char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<unsigned char*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<unsigned char*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, unsigned char*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, unsigned char*, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, unsigned char*, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, unsigned char*>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = unsigned char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = unsigned char*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = unsigned char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<unsigned char*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<unsigned char*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, unsigned char*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, unsigned char*>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = unsigned char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = unsigned char*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = unsigned char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<unsigned char*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<unsigned char*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, unsigned char*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, unsigned char*, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<signed char*>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = signed char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, signed char*, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, signed char*>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = signed char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = signed char*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = signed char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<signed char*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<signed char*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, signed char*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = signed char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, signed char*>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = signed char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = signed char*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = signed char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<signed char*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<signed char*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, signed char*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = signed char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, signed char*, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, signed char*, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, signed char*>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = signed char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = signed char*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = signed char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<signed char*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<signed char*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, signed char*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = signed char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, signed char*>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = signed char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = signed char*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = signed char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<signed char*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<signed char*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, signed char*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = signed char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, signed char*, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, signed char*, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, signed char*>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = signed char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = signed char*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = signed char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<signed char*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<signed char*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, signed char*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = signed char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, signed char*>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = signed char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = signed char*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = signed char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<signed char*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<signed char*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, signed char*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, signed char*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = signed char*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, signed char*, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<std::basic_streambuf<char>*>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_streambuf<char>*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, std::basic_streambuf<char>*, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, std::basic_streambuf<char>*>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_streambuf<char>*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_streambuf<char>*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::basic_streambuf<char>*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_streambuf<char>*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_streambuf<char, std::char_traits<char> >*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_streambuf<char, std::char_traits<char> >*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_streambuf<char, std::char_traits<char> >*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::basic_streambuf<char>*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_streambuf<char>*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, std::basic_streambuf<char>*>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_streambuf<char>*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_streambuf<char>*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::basic_streambuf<char>*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_streambuf<char>*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_streambuf<char, std::char_traits<char> >*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_streambuf<char, std::char_traits<char> >*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_streambuf<char, std::char_traits<char> >*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::basic_streambuf<char>*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_streambuf<char>*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, std::basic_streambuf<char>*, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, std::basic_streambuf<char>*, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, std::basic_streambuf<char>*>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_streambuf<char>*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_streambuf<char>*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::basic_streambuf<char>*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_streambuf<char>*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_streambuf<char, std::char_traits<char> >*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_streambuf<char, std::char_traits<char> >*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_streambuf<char, std::char_traits<char> >*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::basic_streambuf<char>*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_streambuf<char>*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, std::basic_streambuf<char>*>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_streambuf<char>*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_streambuf<char>*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::basic_streambuf<char>*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_streambuf<char>*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_streambuf<char, std::char_traits<char> >*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_streambuf<char, std::char_traits<char> >*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_streambuf<char, std::char_traits<char> >*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::basic_streambuf<char>*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_streambuf<char>*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, std::basic_streambuf<char>*, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, std::basic_streambuf<char>*, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, std::basic_streambuf<char>*>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_streambuf<char>*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_streambuf<char>*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::basic_streambuf<char>*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_streambuf<char>*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_streambuf<char, std::char_traits<char> >*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_streambuf<char, std::char_traits<char> >*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_streambuf<char, std::char_traits<char> >*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::basic_streambuf<char>*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_streambuf<char>*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, std::basic_streambuf<char>*>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::basic_streambuf<char>*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::basic_streambuf<char>*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::basic_streambuf<char>*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::basic_streambuf<char>*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_streambuf<char, std::char_traits<char> >*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::basic_streambuf<char, std::char_traits<char> >*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::basic_streambuf<char, std::char_traits<char> >*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::basic_streambuf<char>*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::basic_streambuf<char>*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, std::basic_streambuf<char>*, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<void*>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = void*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, void*, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, void*>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = void*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = void*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = void*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<void*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, void*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<void*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, void*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, void*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = void*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, void*>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = void*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = void*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = void*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<void*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, void*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<void*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, void*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, void*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = void*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, void*, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, void*, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, void*>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = void*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = void*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = void*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<void*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, void*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<void*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, void*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, void*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = void*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, void*>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = void*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = void*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = void*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<void*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, void*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<void*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, void*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, void*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = void*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, void*, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, void*, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, void*>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = void*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = void*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = void*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<void*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, void*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<void*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, void*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, void*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = void*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, void*>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = void*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = void*; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = void*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<void*, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, void*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<void*, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, void*&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, void*, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = void*]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, void*, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<long double>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, long double, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, long double>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long double; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long double, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long double, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long double, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, long double>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long double; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long double, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long double, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long double, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, long double, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, long double, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, long double>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long double; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long double, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long double, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long double, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, long double>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long double; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long double, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long double, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long double, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, long double, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, long double, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, long double>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long double; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long double, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long double, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long double, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, long double>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long double; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long double, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long double, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long double, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, long double, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<double>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, double, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, double>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = double; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<double, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<double, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, double, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, double>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = double; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<double, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<double, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, double, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, double, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, double, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, double>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = double; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<double, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<double, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, double, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, double>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = double; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<double, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<double, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, double, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, double, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, double, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, double>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = double; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<double, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<double, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, double, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, double>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = double; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<double, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<double, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, double&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, double, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = double]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, double, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<float>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = float]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, float, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, float>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = float]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = float; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = float]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<float, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, float&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<float, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, float&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, float, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = float]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, float>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = float]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = float; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = float]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<float, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, float&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<float, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, float&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, float, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = float]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, float, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, float, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, float>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = float]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = float; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = float]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<float, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, float&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<float, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, float&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, float, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = float]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, float>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = float]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = float; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = float]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<float, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, float&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<float, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, float&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, float, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = float]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, float, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, float, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, float>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = float]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = float; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = float]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<float, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, float&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<float, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, float&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, float, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = float]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, float>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = float]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = float; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = float]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<float, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, float&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<float, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, float&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, float, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = float]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, float, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<long long unsigned int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, long long unsigned int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, long long unsigned int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long long unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long long unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long long unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long long unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, long long unsigned int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long long unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long long unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long long unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long long unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, long long unsigned int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, long long unsigned int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, long long unsigned int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long long unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long long unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long long unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long long unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, long long unsigned int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long long unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long long unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long long unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long long unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, long long unsigned int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, long long unsigned int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, long long unsigned int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long long unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long long unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long long unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long long unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, long long unsigned int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long long unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long long unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long long unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long long unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, long long unsigned int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<long long int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, long long int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, long long int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long long int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long long int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long long int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long long int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, long long int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long long int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long long int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long long int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long long int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, long long int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, long long int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, long long int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long long int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long long int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long long int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long long int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, long long int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long long int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long long int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long long int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long long int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, long long int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, long long int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, long long int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long long int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long long int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long long int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long long int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, long long int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long long int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long long int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long long int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long long int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, long long int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<long unsigned int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, long unsigned int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, long unsigned int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, long unsigned int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, long unsigned int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, long unsigned int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, long unsigned int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, long unsigned int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, long unsigned int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, long unsigned int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, long unsigned int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, long unsigned int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, long unsigned int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<long int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, long int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, long int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, long int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, long int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, long int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, long int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, long int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, long int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, long int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, long int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, long int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = long int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<long int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<long int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, long int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, long int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = long int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, long int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<unsigned int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, unsigned int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, unsigned int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, unsigned int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, unsigned int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, unsigned int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, unsigned int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, unsigned int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, unsigned int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, unsigned int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, unsigned int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, unsigned int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, unsigned int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<short unsigned int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = short unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, short unsigned int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, short unsigned int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = short unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = short unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = short unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<short unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<short unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, short unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = short unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, short unsigned int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = short unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = short unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = short unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<short unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<short unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, short unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = short unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, short unsigned int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, short unsigned int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, short unsigned int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = short unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = short unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = short unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<short unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<short unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, short unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = short unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, short unsigned int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = short unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = short unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = short unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<short unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<short unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, short unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = short unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, short unsigned int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, short unsigned int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, short unsigned int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = short unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = short unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = short unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<short unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<short unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, short unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = short unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, short unsigned int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = short unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = short unsigned int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = short unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<short unsigned int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<short unsigned int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short unsigned int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, short unsigned int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = short unsigned int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, short unsigned int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<short int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = short int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, short int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, short int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = short int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = short int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = short int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<short int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<short int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, short int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = short int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, short int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = short int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = short int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = short int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<short int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<short int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, short int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = short int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, short int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, short int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, short int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = short int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = short int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = short int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<short int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<short int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, short int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = short int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, short int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = short int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = short int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = short int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<short int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<short int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, short int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = short int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, short int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, short int, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, short int>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = short int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = short int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = short int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<short int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<short int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, short int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = short int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, short int>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = short int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = short int; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = short int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<short int, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<short int, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, short int&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, short int, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = short int]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, short int, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<bool>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = bool]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, bool, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, bool>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = bool]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = bool; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = bool]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<bool, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, bool&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<bool, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, bool&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, bool, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = bool]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, bool>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = bool]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = bool; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = bool]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<bool, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, bool&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<bool, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, bool&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, bool, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = bool]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, bool, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, bool, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, bool>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = bool]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = bool; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = bool]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<bool, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, bool&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<bool, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, bool&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, bool, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = bool]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, bool>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = bool]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = bool; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = bool]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<bool, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, bool&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<bool, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, bool&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, bool, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = bool]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8: error: base class 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, bool, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, bool, void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8:   required from 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, bool>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = bool]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = bool; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = bool]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<bool, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, bool&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<bool, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, bool&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, bool, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = bool]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2713:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_array_type<nlohmann::basic_json<>, bool>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3099:89:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = bool]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = bool; <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = bool]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<bool, void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, bool&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<bool, void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, bool&}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, bool, void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = bool]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2752:8: error: base class 'struct nlohmann::detail::is_constructible_array_type_impl<nlohmann::basic_json<>, bool, void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_array_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_basic_json<std::ios_base& (*)(std::ios_base&)>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2524:24:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::ios_base& (*)(std::ios_base&)]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2476:27: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 template<typename> struct is_basic_json : std::false_type {};
                           ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, std::ios_base& (*)(std::ios_base&), void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8:   required from 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, std::ios_base& (*)(std::ios_base&)>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::ios_base& (*)(std::ios_base&)]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::ios_base& (*)(std::ios_base&); <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::ios_base& (*)(std::ios_base&)]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::ios_base& (*)(std::ios_base&), void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::ios_base& (*&)(std::ios_base&)}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::ios_base& (*)(std::ios_base&), void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::ios_base& (*&)(std::ios_base&)}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::ios_base& (*)(std::ios_base&), void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::ios_base& (*)(std::ios_base&)]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2621:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_object_type<nlohmann::basic_json<>, std::ios_base& (*)(std::ios_base&)>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3120:106:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::ios_base& (*)(std::ios_base&)]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::ios_base& (*)(std::ios_base&); <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::ios_base& (*)(std::ios_base&)]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::ios_base& (*)(std::ios_base&), void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::ios_base& (*&)(std::ios_base&)}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::ios_base& (*)(std::ios_base&), void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::ios_base& (*&)(std::ios_base&)}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::ios_base& (*)(std::ios_base&), void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::ios_base& (*)(std::ios_base&)]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2648:8: error: base class 'struct nlohmann::detail::is_constructible_object_type_impl<nlohmann::basic_json<>, std::ios_base& (*)(std::ios_base&), void>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_object_type
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type_impl<nlohmann::basic_json<>, std::ios_base& (*)(std::ios_base&), void>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:2686:8:   required from 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, std::ios_base& (*)(std::ios_base&)>'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::ios_base& (*)(std::ios_base&)]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::ios_base& (*)(std::ios_base&); <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::ios_base& (*)(std::ios_base&)]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::ios_base& (*)(std::ios_base&), void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::ios_base& (*&)(std::ios_base&)}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2376:74:   required by substitution of 'template<class Expected, template<class ...> class Op, class ... Args> using is_detected_exact = std::is_same<Expected, typename nlohmann::detail::detector<nlohmann::detail::nonesuch, void, Op, Args ...>::type> [with Expected = void; Op = nlohmann::detail::from_json_function; Args = {nlohmann::basic_json<>::json_serializer<std::ios_base& (*)(std::ios_base&), void>, const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&, std::ios_base& (*&)(std::ios_base&)}]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2528:27:   required from 'constexpr const bool nlohmann::detail::has_from_json<nlohmann::basic_json<>, std::ios_base& (*)(std::ios_base&), void>::value'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17170:62:   required by substitution of 'template<class T, class U> using get_template_function = decltype (declval<T>().get<U>()) [with T = const nlohmann::basic_json<>&; U = std::ios_base& (*)(std::ios_base&)]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:17474:20:   required from here
/home/berenger/src/librascal/src/rascal/external/json.hpp:2672:8: error: base class 'struct std::integral_constant<bool, false>' has a non-virtual destructor [-Werror=effc++]
 struct is_constructible_string_type_impl : std::false_type {};
        ^
/home/berenger/src/librascal/src/rascal/external/json.hpp: In instantiation of 'struct nlohmann::detail::is_constructible_string_type<nlohmann::basic_json<>, std::ios_base& (*)(std::ios_base&)>':
/home/berenger/src/librascal/src/rascal/external/json.hpp:3101:15:   required by substitution of 'template<class BasicJsonType, class T> decltype ((nlohmann::detail::from_json(j, val), void())) nlohmann::detail::from_json_fn::operator()(const BasicJsonType&, T&) const [with BasicJsonType = nlohmann::basic_json<>; T = std::ios_base& (*)(std::ios_base&)]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:3812:74:   required by substitution of 'template<class BasicJsonType, class ValueType> static decltype ((nlohmann::{anonymous}::from_json(forward<BasicJsonType>(j), val), void())) nlohmann::adl_serializer<T, SFINAE>::from_json(BasicJsonType&&, ValueType&) [with BasicJsonType = BasicJsonType; ValueType = ValueType; <template-parameter-1-1> = std::ios_base& (*)(std::ios_base&); <template-parameter-1-2> = void] [with BasicJsonType = const nlohmann::basic_json<>&; ValueType = std::ios_base& (*)(std::ios_base&)]'
/home/berenger/src/librascal/src/rascal/external/json.hpp:2513:73:   required by substitution of 'template<class T, class ... Args> using from_json_function = decltype (T:: from_json((declval<Args>)()...)) [with T = nlohmann::adl_serializer<std::ios_base& (*)(std::ios_base&), void>; Args = {const nlohmann::basic_json<std::map, std::vector, std::basic_string<char, std::char_trai