// // execution/detail/as_receiver.hpp // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // // Copyright (c) 2003-2023 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_EXECUTION_DETAIL_AS_RECEIVER_HPP #define ASIO_EXECUTION_DETAIL_AS_RECEIVER_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/traits/set_done_member.hpp" #include "asio/traits/set_error_member.hpp" #include "asio/traits/set_value_member.hpp" #include "asio/detail/push_options.hpp" namespace asio { namespace execution { namespace detail { template <typename Function, typename> struct as_receiver { Function f_; template <typename F> explicit as_receiver(ASIO_MOVE_ARG(F) f, int) : f_(ASIO_MOVE_CAST(F)(f)) { } #if defined(ASIO_MSVC) && defined(ASIO_HAS_MOVE) as_receiver(as_receiver&& other) : f_(ASIO_MOVE_CAST(Function)(other.f_)) { } #endif // defined(ASIO_MSVC) && defined(ASIO_HAS_MOVE) void set_value() ASIO_NOEXCEPT_IF(noexcept(declval<Function&>()())) { f_(); } template <typename E> void set_error(E) ASIO_NOEXCEPT { std::terminate(); } void set_done() ASIO_NOEXCEPT { } }; template <typename T> struct is_as_receiver : false_type { }; template <typename Function, typename T> struct is_as_receiver<as_receiver<Function, T> > : true_type { }; } // namespace detail } // namespace execution namespace traits { #if !defined(ASIO_HAS_DEDUCED_SET_VALUE_MEMBER_TRAIT) template <typename Function, typename T> struct set_value_member< asio::execution::detail::as_receiver<Function, T>, void()> { ASIO_STATIC_CONSTEXPR(bool, is_valid = true); #if defined(ASIO_HAS_NOEXCEPT) ASIO_STATIC_CONSTEXPR(bool, is_noexcept = noexcept(declval<Function&>()())); #else // defined(ASIO_HAS_NOEXCEPT) ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true); #endif // defined(ASIO_HAS_NOEXCEPT) typedef void result_type; }; #endif // !defined(ASIO_HAS_DEDUCED_SET_VALUE_MEMBER_TRAIT) #if !defined(ASIO_HAS_DEDUCED_SET_ERROR_MEMBER_TRAIT) template <typename Function, typename T, typename E> struct set_error_member< asio::execution::detail::as_receiver<Function, T>, E> { ASIO_STATIC_CONSTEXPR(bool, is_valid = true); ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true); typedef void result_type; }; #endif // !defined(ASIO_HAS_DEDUCED_SET_ERROR_MEMBER_TRAIT) #if !defined(ASIO_HAS_DEDUCED_SET_DONE_MEMBER_TRAIT) template <typename Function, typename T> struct set_done_member< asio::execution::detail::as_receiver<Function, T> > { ASIO_STATIC_CONSTEXPR(bool, is_valid = true); ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true); typedef void result_type; }; #endif // !defined(ASIO_HAS_DEDUCED_SET_DONE_MEMBER_TRAIT) } // namespace traits } // namespace asio #include "asio/detail/pop_options.hpp" #endif // ASIO_EXECUTION_DETAIL_AS_RECEIVER_HPP