130 lines
2.7 KiB
C++
130 lines
2.7 KiB
C++
//
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// experimental/detail/channel_message.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2024 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef ASIO_EXPERIMENTAL_DETAIL_CHANNEL_MESSAGE_HPP
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#define ASIO_EXPERIMENTAL_DETAIL_CHANNEL_MESSAGE_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/config.hpp"
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#include <tuple>
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#include "asio/detail/type_traits.hpp"
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#include "asio/detail/utility.hpp"
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#include "asio/detail/push_options.hpp"
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namespace asio {
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namespace experimental {
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namespace detail {
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template <typename Signature>
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class channel_message;
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template <typename R>
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class channel_message<R()>
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{
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public:
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channel_message(int)
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{
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}
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template <typename Handler>
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void receive(Handler& handler)
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{
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static_cast<Handler&&>(handler)();
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}
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};
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template <typename R, typename Arg0>
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class channel_message<R(Arg0)>
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{
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public:
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template <typename T0>
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channel_message(int, T0&& t0)
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: arg0_(static_cast<T0&&>(t0))
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{
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}
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template <typename Handler>
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void receive(Handler& handler)
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{
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static_cast<Handler&&>(handler)(
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static_cast<arg0_type&&>(arg0_));
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}
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private:
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typedef decay_t<Arg0> arg0_type;
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arg0_type arg0_;
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};
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template <typename R, typename Arg0, typename Arg1>
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class channel_message<R(Arg0, Arg1)>
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{
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public:
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template <typename T0, typename T1>
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channel_message(int, T0&& t0, T1&& t1)
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: arg0_(static_cast<T0&&>(t0)),
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arg1_(static_cast<T1&&>(t1))
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{
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}
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template <typename Handler>
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void receive(Handler& handler)
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{
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static_cast<Handler&&>(handler)(
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static_cast<arg0_type&&>(arg0_),
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static_cast<arg1_type&&>(arg1_));
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}
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private:
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typedef decay_t<Arg0> arg0_type;
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arg0_type arg0_;
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typedef decay_t<Arg1> arg1_type;
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arg1_type arg1_;
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};
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template <typename R, typename... Args>
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class channel_message<R(Args...)>
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{
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public:
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template <typename... T>
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channel_message(int, T&&... t)
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: args_(static_cast<T&&>(t)...)
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{
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}
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template <typename Handler>
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void receive(Handler& h)
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{
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this->do_receive(h, asio::detail::index_sequence_for<Args...>());
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}
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private:
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template <typename Handler, std::size_t... I>
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void do_receive(Handler& h, asio::detail::index_sequence<I...>)
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{
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static_cast<Handler&&>(h)(
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std::get<I>(static_cast<args_type&&>(args_))...);
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}
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typedef std::tuple<decay_t<Args>...> args_type;
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args_type args_;
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};
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} // namespace detail
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} // namespace experimental
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} // namespace asio
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#include "asio/detail/pop_options.hpp"
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#endif // ASIO_EXPERIMENTAL_DETAIL_CHANNEL_MESSAGE_HPP
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