IsContainer.hpp

namespace Internal
	{
		template<typename T> struct IsContainerHelper
		{
			template<typename U,
				typename Require1 = decltype(std::begin(std::declval<const U&>())),
				typename Require2 = decltype(std::end(std::declval<const U&>()))>
			static std::true_type test(const U*);

			template<typename U> static std::false_type test(...);
			using Type = decltype(test<T>(0));
			const std::integral_constant<bool, Type::value> value;
		};
	}

	template<typename T> using IsContainer = typename Internal::IsContainerHelper<T>::Type;