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//
// detail/completion_message.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2024 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 BOOST_ASIO_DETAIL_COMPLETION_MESSAGE_HPP
#define BOOST_ASIO_DETAIL_COMPLETION_MESSAGE_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include <boost/asio/detail/config.hpp>
#include <tuple>
#include <boost/asio/detail/type_traits.hpp>
#include <boost/asio/detail/utility.hpp>
#include <boost/asio/detail/push_options.hpp>
namespace boost {
namespace asio {
namespace detail {
template <typename Signature>
class completion_message;
template <typename R>
class completion_message<R()>
{
public:
completion_message(int)
{
}
template <typename Handler>
void receive(Handler& handler)
{
static_cast<Handler&&>(handler)();
}
};
template <typename R, typename Arg0>
class completion_message<R(Arg0)>
{
public:
template <typename T0>
completion_message(int, T0&& t0)
: arg0_(static_cast<T0&&>(t0))
{
}
template <typename Handler>
void receive(Handler& handler)
{
static_cast<Handler&&>(handler)(
static_cast<arg0_type&&>(arg0_));
}
private:
typedef decay_t<Arg0> arg0_type;
arg0_type arg0_;
};
template <typename R, typename Arg0, typename Arg1>
class completion_message<R(Arg0, Arg1)>
{
public:
template <typename T0, typename T1>
completion_message(int, T0&& t0, T1&& t1)
: arg0_(static_cast<T0&&>(t0)),
arg1_(static_cast<T1&&>(t1))
{
}
template <typename Handler>
void receive(Handler& handler)
{
static_cast<Handler&&>(handler)(
static_cast<arg0_type&&>(arg0_),
static_cast<arg1_type&&>(arg1_));
}
private:
typedef decay_t<Arg0> arg0_type;
arg0_type arg0_;
typedef decay_t<Arg1> arg1_type;
arg1_type arg1_;
};
template <typename R, typename... Args>
class completion_message<R(Args...)>
{
public:
template <typename... T>
completion_message(int, T&&... t)
: args_(static_cast<T&&>(t)...)
{
}
template <typename Handler>
void receive(Handler& h)
{
this->do_receive(h, boost::asio::detail::index_sequence_for<Args...>());
}
private:
template <typename Handler, std::size_t... I>
void do_receive(Handler& h, boost::asio::detail::index_sequence<I...>)
{
static_cast<Handler&&>(h)(
std::get<I>(static_cast<args_type&&>(args_))...);
}
typedef std::tuple<decay_t<Args>...> args_type;
args_type args_;
};
} // namespace detail
} // namespace asio
} // namespace boost
#include <boost/asio/detail/pop_options.hpp>
#endif // BOOST_ASIO_DETAIL_COMPLETION_MESSAGE_HPP
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