| // |
| // experimental/detail/channel_payload.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
| // |
| // Distributed under the Boost Software License, Version 1.0. (See accompanying |
| // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| // |
| |
| #ifndef ASIO_EXPERIMENTAL_DETAIL_CHANNEL_PAYLOAD_HPP |
| #define ASIO_EXPERIMENTAL_DETAIL_CHANNEL_PAYLOAD_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include "asio/detail/config.hpp" |
| #include <variant> |
| #include "asio/detail/type_traits.hpp" |
| #include "asio/experimental/detail/channel_message.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| |
| namespace asio { |
| namespace experimental { |
| namespace detail { |
| |
| template <typename... Signatures> |
| class channel_payload |
| { |
| public: |
| template <typename Signature> |
| channel_payload(ASIO_MOVE_ARG(channel_message<Signature>) m) |
| : message_(ASIO_MOVE_CAST(channel_message<Signature>)(m)) |
| { |
| } |
| |
| template <typename Handler> |
| void receive(Handler& handler) |
| { |
| std::visit( |
| [&](auto& message) |
| { |
| message.receive(handler); |
| }, message_); |
| } |
| |
| private: |
| std::variant<channel_message<Signatures>...> message_; |
| }; |
| |
| template <typename R> |
| class channel_payload<R()> |
| { |
| public: |
| explicit channel_payload(channel_message<R()>) |
| { |
| } |
| |
| template <typename Handler> |
| void receive(Handler& handler) |
| { |
| ASIO_MOVE_OR_LVALUE(Handler)(handler)(); |
| } |
| }; |
| |
| template <typename Signature> |
| class channel_payload<Signature> |
| { |
| public: |
| channel_payload(ASIO_MOVE_ARG(channel_message<Signature>) m) |
| : message_(ASIO_MOVE_CAST(channel_message<Signature>)(m)) |
| { |
| } |
| |
| template <typename Handler> |
| void receive(Handler& handler) |
| { |
| message_.receive(handler); |
| } |
| |
| private: |
| channel_message<Signature> message_; |
| }; |
| |
| } // namespace detail |
| } // namespace experimental |
| } // namespace asio |
| |
| #include "asio/detail/pop_options.hpp" |
| |
| #endif // ASIO_EXPERIMENTAL_DETAIL_CHANNEL_PAYLOAD_HPP |