| // |
| // experimental/append.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_APPEND_HPP |
| #define ASIO_EXPERIMENTAL_APPEND_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include "asio/detail/config.hpp" |
| #include <tuple> |
| #include "asio/detail/type_traits.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| |
| namespace asio { |
| namespace experimental { |
| |
| /// Completion token type used to specify that the completion handler |
| /// arguments should be passed additional values. |
| template <typename CompletionToken, typename... Values> |
| class append_t |
| { |
| public: |
| /// Constructor. |
| template <typename T, typename... V> |
| ASIO_CONSTEXPR explicit append_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)...) |
| { |
| } |
| |
| //private: |
| CompletionToken token_; |
| std::tuple<Values...> values_; |
| }; |
| |
| /// Create a completion token to specify that the completion handler arguments |
| /// should be combined into a single tuple argument. |
| template <typename CompletionToken, typename... Values> |
| inline ASIO_CONSTEXPR append_t< |
| typename decay<CompletionToken>::type, typename decay<Values>::type...> |
| append(ASIO_MOVE_ARG(CompletionToken) completion_token, |
| ASIO_MOVE_ARG(Values)... values) |
| { |
| return append_t< |
| typename decay<CompletionToken>::type, typename decay<Values>::type...>( |
| ASIO_MOVE_CAST(CompletionToken)(completion_token), |
| ASIO_MOVE_CAST(Values)(values)...); |
| } |
| |
| } // namespace experimental |
| } // namespace asio |
| |
| #include "asio/detail/pop_options.hpp" |
| |
| #include "asio/experimental/impl/append.hpp" |
| |
| #endif // ASIO_EXPERIMENTAL_APPEND_HPP |