sol2/sol/in_place.hpp
ThePhD e69e7c79fa C++17 additions: std::variant, string_views of all types, checker for if we have the right version
added variadic_results, to return a variable number of arguments to Lua
added variadic_results and as_results
added improved function examples (for multiple results and split overloading out)
added tests for variadics
added tests for C++17 utilities
added a forwarding header
added a specific `unsafe_function` header
added and improved documetation pages
2017-07-09 12:54:52 -04:00

73 lines
2.7 KiB
C++

// The MIT License (MIT)
// Copyright (c) 2013-2017 Rapptz, ThePhD and contributors
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#ifndef SOL_IN_PLACE_HPP
#define SOL_IN_PLACE_HPP
#include <cstddef>
#include <utility>
namespace sol {
#ifdef SOL_CXX17_FEATURES
using in_place_t = std::in_place_t;
constexpr std::in_place_t in_place{};
template <typename T> using in_place_type_t = std::in_place_type_t<T>;
template <typename T>
constexpr std::in_place_type_t<T> in_place_type{};
template <size_t I> using in_place_index_t = std::in_place_index_t<I>;
template <size_t I>
constexpr in_place_index_t<I> in_place_index{};
#else
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 { constexpr in_place_tag() = default; };
constexpr inline in_place_tag in_place (detail::in_place_of) { return in_place_tag(); }
template <typename T>
constexpr inline in_place_tag in_place (detail::in_place_of_t<T>) { return in_place_tag(); }
template <std::size_t I>
constexpr inline in_place_tag in_place (detail::in_place_of_i<I>) { return in_place_tag(); }
template <typename T>
constexpr inline in_place_tag in_place_type (detail::in_place_of_t<T>) { return in_place_tag(); }
template <std::size_t I>
constexpr inline in_place_tag in_place_index (detail::in_place_of_i<I>) { return in_place_tag(); }
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>);
#endif
} // sol
#endif // SOL_IN_PLACE_HPP