| // |
| // redirect_error.hpp |
| // ~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2015 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_REDIRECT_ERROR_HPP |
| #define ASIO_REDIRECT_ERROR_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include "asio/detail/config.hpp" |
| #include "asio/detail/type_traits.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| |
| namespace asio { |
| |
| /// Completion token type used to specify that an error produced by an |
| /// asynchronous operation is captured to an error_code variable. |
| /** |
| * The redirect_error_t class is used to indicate that any error_code produced |
| * by an asynchronous operation is captured to a specified variable. |
| */ |
| template <typename CompletionToken> |
| class redirect_error_t |
| { |
| public: |
| /// Constructor. |
| template <typename T> |
| redirect_error_t(ASIO_MOVE_ARG(T) completion_token, error_code& ec) |
| : token_(ASIO_MOVE_CAST(T)(completion_token)), |
| ec_(ec) |
| { |
| } |
| |
| //private: |
| CompletionToken token_; |
| error_code& ec_; |
| }; |
| |
| /// Create a completion token to capture error_code values to a variable. |
| template <typename CompletionToken> |
| inline redirect_error_t<typename decay<CompletionToken>::type> |
| redirect_error(CompletionToken&& completion_token, error_code& ec) |
| { |
| return redirect_error_t<typename decay<CompletionToken>::type>( |
| ASIO_MOVE_CAST(CompletionToken)(completion_token), ec); |
| } |
| |
| } // namespace asio |
| |
| #include "asio/detail/pop_options.hpp" |
| |
| #include "asio/impl/redirect_error.hpp" |
| |
| #endif // ASIO_REDIRECT_ERROR_HPP |