sol2/sol/stack_check_get_qualified.hpp

// sol2

// The MIT License (MIT)

// Copyright (c) 2013-2018 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_STACK_CHECK_QUALIFIED_GET_HPP
#define SOL_STACK_CHECK_QUALIFIED_GET_HPP

#include "stack_core.hpp"
#include "stack_get.hpp"
#include "stack_check.hpp"
#include "optional.hpp"
#include <cstdlib>
#include <cmath>

namespace sol {
namespace stack {
	template <typename T, typename C>
	struct qualified_check_getter {
		typedef decltype(stack_detail::unchecked_get<T>(nullptr, 0, std::declval<record&>())) R;

		template <typename Handler>
		static optional<R> get(lua_State* L, int index, Handler&& handler, record& tracking) {
			if (!check<T>(L, index, std::forward<Handler>(handler))) {
				tracking.use(static_cast<int>(!lua_isnone(L, index)));
				return nullopt;
			}
			return stack_detail::unchecked_get<T>(L, index, tracking);
		}
	};
}
} // namespace sol::stack

#endif // SOL_STACK_CHECK_QUALIFIED_GET_HPP