total_size_of.h

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/*
 * Copyright 2024 MusicScience37 (Kenta Kabashima)
 *
 * 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 <cstddef>
 
namespace msgpack_light::details {

template <typename... T>
struct total_size_of_impl;

template <typename First, typename... Remaining>
struct total_size_of_impl<First, Remaining...> {
    static constexpr std::size_t value =
        sizeof(First) + total_size_of_impl<Remaining...>::value;
};

template <typename T>
struct total_size_of_impl<T> {
    static constexpr std::size_t value = sizeof(T);
};

template <typename... T>
constexpr std::size_t total_size_of = total_size_of_impl<T...>::value;
 
}  // namespace msgpack_light::details