sol2/include/sol/make_reference.hpp

// sol3

// The MIT License (MIT)

// Copyright (c) 2013-2021 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
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

#ifndef SOL_MAKE_REFERENCE_HPP
#define SOL_MAKE_REFERENCE_HPP

#include <sol/reference.hpp>
#include <sol/stack.hpp>

namespace sol {

	template <typename R = reference, bool should_pop = !is_stack_based_v<R>, typename T>
	R make_reference(lua_State* L, T&& value) {
		int backpedal = stack::push(L, std::forward<T>(value));
		R r = stack::get<R>(L, -backpedal);
		if (should_pop) {
			lua_pop(L, backpedal);
		}
		return r;
	}

	template <typename T, typename R = reference, bool should_pop = !is_stack_based_v<R>, typename... Args>
	R make_reference(lua_State* L, Args&&... args) {
		int backpedal = stack::push<T>(L, std::forward<Args>(args)...);
		R r = stack::get<R>(L, -backpedal);
		if (should_pop) {
			lua_pop(L, backpedal);
		}
		return r;
	}

	template <typename R = reference, bool should_pop = !is_stack_based_v<R>, typename T>
	R make_reference_userdata(lua_State* L, T&& value) {
		int backpedal = stack::push_userdata(L, std::forward<T>(value));
		R r = stack::get<R>(L, -backpedal);
		if (should_pop) {
			lua_pop(L, backpedal);
		}
		return r;
	}

	template <typename T, typename R = reference, bool should_pop = !is_stack_based_v<R>, typename... Args>
	R make_reference_userdata(lua_State* L, Args&&... args) {
		int backpedal = stack::push_userdata<T>(L, std::forward<Args>(args)...);
		R r = stack::get<R>(L, -backpedal);
		if (should_pop) {
			lua_pop(L, backpedal);
		}
		return r;
	}

} // namespace sol

#endif // SOL_MAKE_REFERENCE_HPP