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- //
- // redirect_error.hpp
- // ~~~~~~~~~~~~~~~~~~
- //
- // Copyright (c) 2003-2019 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_REDIRECT_ERROR_HPP
- #define BOOST_ASIO_REDIRECT_ERROR_HPP
- #if defined(_MSC_VER) && (_MSC_VER >= 1200)
- # pragma once
- #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
- #include <boost/asio/detail/config.hpp>
- #include <boost/asio/detail/type_traits.hpp>
- #include <boost/system/error_code.hpp>
- #include <boost/asio/detail/push_options.hpp>
- namespace boost {
- 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(BOOST_ASIO_MOVE_ARG(T) completion_token,
- boost::system::error_code& ec)
- : token_(BOOST_ASIO_MOVE_CAST(T)(completion_token)),
- ec_(ec)
- {
- }
- //private:
- CompletionToken token_;
- boost::system::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(
- BOOST_ASIO_MOVE_ARG(CompletionToken) completion_token,
- boost::system::error_code& ec)
- {
- return redirect_error_t<typename decay<CompletionToken>::type>(
- BOOST_ASIO_MOVE_CAST(CompletionToken)(completion_token), ec);
- }
- } // namespace asio
- } // namespace boost
- #include <boost/asio/detail/pop_options.hpp>
- #include <boost/asio/impl/redirect_error.hpp>
- #endif // BOOST_ASIO_REDIRECT_ERROR_HPP
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