//
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// redirect_error.hpp
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// ~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2020 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef BOOST_ASIO_REDIRECT_ERROR_HPP
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#define BOOST_ASIO_REDIRECT_ERROR_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include <boost/asio/detail/config.hpp>
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#include <boost/asio/detail/type_traits.hpp>
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#include <boost/system/error_code.hpp>
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#include <boost/asio/detail/push_options.hpp>
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namespace boost {
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namespace asio {
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/// Completion token type used to specify that an error produced by an
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/// asynchronous operation is captured to an error_code variable.
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/**
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* The redirect_error_t class is used to indicate that any error_code produced
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* by an asynchronous operation is captured to a specified variable.
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*/
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template <typename CompletionToken>
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class redirect_error_t
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{
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public:
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/// Constructor.
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template <typename T>
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redirect_error_t(BOOST_ASIO_MOVE_ARG(T) completion_token,
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boost::system::error_code& ec)
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: token_(BOOST_ASIO_MOVE_CAST(T)(completion_token)),
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ec_(ec)
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{
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}
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//private:
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CompletionToken token_;
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boost::system::error_code& ec_;
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};
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/// Create a completion token to capture error_code values to a variable.
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template <typename CompletionToken>
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inline redirect_error_t<typename decay<CompletionToken>::type> redirect_error(
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BOOST_ASIO_MOVE_ARG(CompletionToken) completion_token,
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boost::system::error_code& ec)
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{
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return redirect_error_t<typename decay<CompletionToken>::type>(
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BOOST_ASIO_MOVE_CAST(CompletionToken)(completion_token), ec);
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}
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} // namespace asio
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} // namespace boost
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#include <boost/asio/detail/pop_options.hpp>
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#include <boost/asio/impl/redirect_error.hpp>
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#endif // BOOST_ASIO_REDIRECT_ERROR_HPP
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