//
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// execution/detail/void_receiver.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_EXECUTION_DETAIL_VOID_RECEIVER_HPP
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#define BOOST_ASIO_EXECUTION_DETAIL_VOID_RECEIVER_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/traits/set_done_member.hpp>
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#include <boost/asio/traits/set_error_member.hpp>
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#include <boost/asio/traits/set_value_member.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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namespace execution {
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namespace detail {
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struct void_receiver
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{
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void set_value() BOOST_ASIO_NOEXCEPT
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{
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}
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template <typename E>
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void set_error(BOOST_ASIO_MOVE_ARG(E)) BOOST_ASIO_NOEXCEPT
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{
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}
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void set_done() BOOST_ASIO_NOEXCEPT
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{
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}
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};
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} // namespace detail
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} // namespace execution
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namespace traits {
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#if !defined(BOOST_ASIO_HAS_DEDUCED_SET_VALUE_MEMBER_TRAIT)
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template <>
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struct set_value_member<boost::asio::execution::detail::void_receiver, void()>
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{
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BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
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BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
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typedef void result_type;
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};
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#endif // !defined(BOOST_ASIO_HAS_DEDUCED_SET_VALUE_MEMBER_TRAIT)
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#if !defined(BOOST_ASIO_HAS_DEDUCED_SET_ERROR_MEMBER_TRAIT)
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template <typename E>
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struct set_error_member<boost::asio::execution::detail::void_receiver, E>
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{
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BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
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BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
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typedef void result_type;
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};
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#endif // !defined(BOOST_ASIO_HAS_DEDUCED_SET_ERROR_MEMBER_TRAIT)
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#if !defined(BOOST_ASIO_HAS_DEDUCED_SET_DONE_MEMBER_TRAIT)
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template <>
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struct set_done_member<boost::asio::execution::detail::void_receiver>
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{
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BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
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BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
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typedef void result_type;
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};
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#endif // !defined(BOOST_ASIO_HAS_DEDUCED_SET_DONE_MEMBER_TRAIT)
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} // namespace traits
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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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#endif // BOOST_ASIO_EXECUTION_DETAIL_VOID_RECEIVER_HPP
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