gistfile1.cpp

        ...

        const std::vector<Component> components;

        template <typename C>
        Product(
            typename std::enable_if<
                std::is_same<std::decay<C>::type, std::vector<Component>>::value,
                C
            >::type&& components):
            components(std::forward<C>(components))
        {
        }

        Product(Product<Dim>&&) = default;
        Product(const Product<Dim>&) = default;
  
        ...

In file included from ../include/v8interop/noise/product.h:5:0,
                 from ../v8interop/main.cc:10:
../include/noise/product.h:42:72: error: type/value mismatch at argument 1 in template parameter list for ‘template<class, class> struct std::is_same’
                 std::is_same<std::decay<C>::type, std::vector<Component>>::value,
                                                                        ^
../include/noise/product.h:42:72: error:   expected a type, got ‘std::decay<_Tp>::type’
../include/noise/product.h:44:13: error: template argument 1 is invalid
             >::type&& components):
             ^