89 lines
2.5 KiB
C++
89 lines
2.5 KiB
C++
|
//
|
||
|
|
// consign.hpp
|
||
|
|
// ~~~~~~~~~~
|
||
|
|
//
|
||
|
|
// Copyright (c) 2003-2023 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_CONSIGN_HPP
|
||
|
|
#define ASIO_CONSIGN_HPP
|
||
|
|
|
||
|
|
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
|
||
|
|
# pragma once
|
||
|
|
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
|
||
|
|
|
||
|
|
#include "asio/detail/config.hpp"
|
||
|
|
|
||
|
|
#if (defined(ASIO_HAS_STD_TUPLE) \
|
||
|
|
&& defined(ASIO_HAS_VARIADIC_TEMPLATES)) \
|
||
|
|
|| defined(GENERATING_DOCUMENTATION)
|
||
|
|
|
||
|
|
#include <tuple>
|
||
|
|
#include "asio/detail/type_traits.hpp"
|
||
|
|
|
||
|
|
#include "asio/detail/push_options.hpp"
|
||
|
|
|
||
|
|
namespace asio {
|
||
|
|
|
||
|
|
/// Completion token type used to specify that the completion handler should
|
||
|
|
/// carry additional values along with it.
|
||
|
|
/**
|
||
|
|
* This completion token adapter is typically used to keep at least one copy of
|
||
|
|
* an object, such as a smart pointer, alive until the completion handler is
|
||
|
|
* called.
|
||
|
|
*/
|
||
|
|
template <typename CompletionToken, typename... Values>
|
||
|
|
class consign_t
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
/// Constructor.
|
||
|
|
template <typename T, typename... V>
|
||
|
|
ASIO_CONSTEXPR explicit consign_t(
|
||
|
|
ASIO_MOVE_ARG(T) completion_token,
|
||
|
|
ASIO_MOVE_ARG(V)... values)
|
||
|
|
: token_(ASIO_MOVE_CAST(T)(completion_token)),
|
||
|
|
values_(ASIO_MOVE_CAST(V)(values)...)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
#if defined(GENERATING_DOCUMENTATION)
|
||
|
|
private:
|
||
|
|
#endif // defined(GENERATING_DOCUMENTATION)
|
||
|
|
CompletionToken token_;
|
||
|
|
std::tuple<Values...> values_;
|
||
|
|
};
|
||
|
|
|
||
|
|
/// Completion token adapter used to specify that the completion handler should
|
||
|
|
/// carry additional values along with it.
|
||
|
|
/**
|
||
|
|
* This completion token adapter is typically used to keep at least one copy of
|
||
|
|
* an object, such as a smart pointer, alive until the completion handler is
|
||
|
|
* called.
|
||
|
|
*/
|
||
|
|
template <typename CompletionToken, typename... Values>
|
||
|
|
ASIO_NODISCARD inline ASIO_CONSTEXPR consign_t<
|
||
|
|
typename decay<CompletionToken>::type, typename decay<Values>::type...>
|
||
|
|
consign(ASIO_MOVE_ARG(CompletionToken) completion_token,
|
||
|
|
ASIO_MOVE_ARG(Values)... values)
|
||
|
|
{
|
||
|
|
return consign_t<
|
||
|
|
typename decay<CompletionToken>::type, typename decay<Values>::type...>(
|
||
|
|
ASIO_MOVE_CAST(CompletionToken)(completion_token),
|
||
|
|
ASIO_MOVE_CAST(Values)(values)...);
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace asio
|
||
|
|
|
||
|
|
#include "asio/detail/pop_options.hpp"
|
||
|
|
|
||
|
|
#include "asio/impl/consign.hpp"
|
||
|
|
|
||
|
|
#endif // (defined(ASIO_HAS_STD_TUPLE)
|
||
|
|
// && defined(ASIO_HAS_VARIADIC_TEMPLATES))
|
||
|
|
// || defined(GENERATING_DOCUMENTATION)
|
||
|
|
|
||
|
|
#endif // ASIO_CONSIGN_HPP
|