RcppTOML Install

RcppTOML.cpp

clang++ -std=c++11 -I/Library/Frameworks/R.framework/Resources/include -DNDEBUG -I../inst/include/ -DCPPTOML_USE_MAP -I/usr/local/include -I/usr/local/include/freetype2 -I/opt/X11/include -I"/Users/kyleb/Rlibs/lib/Rcpp/include"   -fPIC  -Wall -mtune=core2 -g -O2 -c RcppExports.cpp -o RcppExports.o
clang++ -std=c++11 -I/Library/Frameworks/R.framework/Resources/include -DNDEBUG -I../inst/include/ -DCPPTOML_USE_MAP -I/usr/local/include -I/usr/local/include/freetype2 -I/opt/X11/include -I"/Users/kyleb/Rlibs/lib/Rcpp/include"   -fPIC  -Wall -mtune=core2 -g -O2 -c parse.cpp -o parse.o
In file included from parse.cpp:22:
In file included from ../inst/include/cpptoml.h:10:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:1720:21: error: conversion from 'Rcpp::internal::generic_proxy<19>' to 'double' is ambiguous
        *__result = *__first;
                    ^~~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:1744:19: note: in instantiation of function template specialization 'std::__1::__copy<Rcpp::internal::Proxy_Iterator<Rcpp::internal::generic_proxy<19> >, double *>' requested here
    return _VSTD::__copy(__unwrap_iter(__first), __unwrap_iter(__last), __unwrap_iter(__result));
                  ^
/Users/kyleb/Rlibs/lib/Rcpp/include/Rcpp/vector/Vector.h:212:14: note: in instantiation of function template specialization 'std::__1::copy<Rcpp::internal::Proxy_Iterator<Rcpp::internal::generic_proxy<19> >, double *>' requested here
        std::copy( first, last, begin() ) ;
             ^
parse.cpp:162:33: note: in instantiation of function template specialization 'Rcpp::Vector<14, PreserveStorage>::Vector<Rcpp::internal::Proxy_Iterator<Rcpp::internal::generic_proxy<19> > >' requested here
            Rcpp::NumericVector v(ll.begin(), ll.end());
                                ^
/Users/kyleb/Rlibs/lib/Rcpp/include/Rcpp/vector/generic_proxy.h:58:26: note: candidate function [with U = double]
                        template <typename U> operator U() const {
                                              ^
/Users/kyleb/Rlibs/lib/Rcpp/include/Rcpp/vector/generic_proxy.h:63:4: note: candidate function
                        operator bool() const { return ::Rcpp::as<bool>(get()) ; }
                        ^
/Users/kyleb/Rlibs/lib/Rcpp/include/Rcpp/vector/generic_proxy.h:64:4: note: candidate function
                        operator int() const { return ::Rcpp::as<int>(get()) ; }
                        ^
In file included from parse.cpp:22:
In file included from ../inst/include/cpptoml.h:10:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:1720:19: error: assigning to 'double' from incompatible type 'Rcpp::internal::generic_proxy<19>'
        *__result = *__first;
                  ^ ~~~~~~~~
2 errors generated.
make: *** [parse.o] Error 1
ERROR: compilation failed for package ‘RcppTOML’
* removing ‘/Users/kyleb/Rlibs/lib/RcppTOML’
Warning in install.packages :
  installation of package ‘RcppTOML’ had non-zero exit status