sol2/sol/in_place.hpp

// The MIT License (MIT) 

// Copyright (c) 2013-2017 Rapptz, ThePhD and contributors

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#ifndef SOL_IN_PLACE_HPP
#define SOL_IN_PLACE_HPP

namespace sol {

	namespace detail {
		struct in_place_of {};
		template <std::size_t I>
		struct in_place_of_i {};
		template <typename T>
		struct in_place_of_t {};
	} // detail

	struct in_place_tag { struct init {}; constexpr in_place_tag(init) {} in_place_tag() = delete; };
	constexpr inline in_place_tag in_place(detail::in_place_of) { return in_place_tag(in_place_tag::init()); }
	template <typename T>
	constexpr inline in_place_tag in_place(detail::in_place_of_t<T>) { return in_place_tag(in_place_tag::init()); }
	template <std::size_t I>
	constexpr inline in_place_tag in_place(detail::in_place_of_i<I>) { return in_place_tag(in_place_tag::init()); }

	using in_place_t = in_place_tag(&)(detail::in_place_of);
	template <typename T>
	using in_place_type_t = in_place_tag(&)(detail::in_place_of_t<T>);
	template <std::size_t I>
	using in_place_index_t = in_place_tag(&)(detail::in_place_of_i<I>);

} // sol

#endif // SOL_IN_PLACE_HPP