src/lib/support/FunctionTraits.h

/*
 *
 *    Copyright (c) 2021 Project CHIP Authors
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

#pragma once

#include <tuple>

namespace chip {

template <typename T>
struct FunctionTraits
{
};

/**
 * Template struct for getting function return type and argument types.
 */
template <typename ReturnT, typename... ArgumentTypes>
struct FunctionTraits<ReturnT (*)(ArgumentTypes...)>
{
    using ReturnType = ReturnT;
    template <size_t i>
    using ArgType = std::tuple_element_t<i, std::tuple<ArgumentTypes...>>;
};

} // namespace chip