899 lines
26 KiB
C++
899 lines
26 KiB
C++
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//
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// execution/relationship.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2023 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 ASIO_EXECUTION_RELATIONSHIP_HPP
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#define ASIO_EXECUTION_RELATIONSHIP_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 "asio/detail/config.hpp"
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#include "asio/detail/type_traits.hpp"
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#include "asio/execution/executor.hpp"
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#include "asio/execution/scheduler.hpp"
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#include "asio/execution/sender.hpp"
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#include "asio/is_applicable_property.hpp"
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#include "asio/query.hpp"
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#include "asio/traits/query_free.hpp"
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#include "asio/traits/query_member.hpp"
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#include "asio/traits/query_static_constexpr_member.hpp"
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#include "asio/traits/static_query.hpp"
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#include "asio/traits/static_require.hpp"
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#include "asio/detail/push_options.hpp"
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namespace asio {
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#if defined(GENERATING_DOCUMENTATION)
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namespace execution {
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/// A property to describe whether submitted tasks represent continuations of
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/// the calling context.
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struct relationship_t
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{
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/// The relationship_t property applies to executors, senders, and schedulers.
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template <typename T>
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static constexpr bool is_applicable_property_v =
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is_executor_v<T> || is_sender_v<T> || is_scheduler_v<T>;
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/// The top-level relationship_t property cannot be required.
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static constexpr bool is_requirable = false;
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/// The top-level relationship_t property cannot be preferred.
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static constexpr bool is_preferable = false;
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/// The type returned by queries against an @c any_executor.
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typedef relationship_t polymorphic_query_result_type;
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/// A sub-property that indicates that the executor does not represent a
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/// continuation of the calling context.
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struct fork_t
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{
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/// The relationship_t::fork_t property applies to executors, senders, and
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/// schedulers.
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template <typename T>
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static constexpr bool is_applicable_property_v =
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is_executor_v<T> || is_sender_v<T> || is_scheduler_v<T>;
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/// The relationship_t::fork_t property can be required.
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static constexpr bool is_requirable = true;
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/// The relationship_t::fork_t property can be preferred.
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static constexpr bool is_preferable = true;
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/// The type returned by queries against an @c any_executor.
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typedef relationship_t polymorphic_query_result_type;
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/// Default constructor.
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constexpr fork_t();
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/// Get the value associated with a property object.
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/**
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* @returns fork_t();
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*/
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static constexpr relationship_t value();
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};
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/// A sub-property that indicates that the executor represents a continuation
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/// of the calling context.
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struct continuation_t
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{
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/// The relationship_t::continuation_t property applies to executors,
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/// senders, and schedulers.
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template <typename T>
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static constexpr bool is_applicable_property_v =
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is_executor_v<T> || is_sender_v<T> || is_scheduler_v<T>;
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/// The relationship_t::continuation_t property can be required.
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static constexpr bool is_requirable = true;
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/// The relationship_t::continuation_t property can be preferred.
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static constexpr bool is_preferable = true;
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/// The type returned by queries against an @c any_executor.
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typedef relationship_t polymorphic_query_result_type;
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/// Default constructor.
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constexpr continuation_t();
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/// Get the value associated with a property object.
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/**
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* @returns continuation_t();
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*/
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static constexpr relationship_t value();
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};
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/// A special value used for accessing the relationship_t::fork_t property.
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static constexpr fork_t fork;
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/// A special value used for accessing the relationship_t::continuation_t
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/// property.
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static constexpr continuation_t continuation;
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/// Default constructor.
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constexpr relationship_t();
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/// Construct from a sub-property value.
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constexpr relationship_t(fork_t);
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/// Construct from a sub-property value.
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constexpr relationship_t(continuation_t);
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/// Compare property values for equality.
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friend constexpr bool operator==(
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const relationship_t& a, const relationship_t& b) noexcept;
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/// Compare property values for inequality.
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friend constexpr bool operator!=(
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const relationship_t& a, const relationship_t& b) noexcept;
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};
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/// A special value used for accessing the relationship_t property.
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constexpr relationship_t relationship;
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} // namespace execution
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#else // defined(GENERATING_DOCUMENTATION)
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namespace execution {
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namespace detail {
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namespace relationship {
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template <int I> struct fork_t;
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template <int I> struct continuation_t;
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} // namespace relationship
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template <int I = 0>
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struct relationship_t
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{
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#if defined(ASIO_HAS_VARIABLE_TEMPLATES)
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# if defined(ASIO_NO_DEPRECATED)
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template <typename T>
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ASIO_STATIC_CONSTEXPR(bool,
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is_applicable_property_v = (
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is_executor<T>::value));
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# else // defined(ASIO_NO_DEPRECATED)
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template <typename T>
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ASIO_STATIC_CONSTEXPR(bool,
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is_applicable_property_v = (
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is_executor<T>::value
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|| conditional<
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is_executor<T>::value,
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false_type,
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is_sender<T>
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>::type::value
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|| conditional<
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is_executor<T>::value,
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false_type,
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is_scheduler<T>
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>::type::value
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));
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# endif // defined(ASIO_NO_DEPRECATED)
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#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES)
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ASIO_STATIC_CONSTEXPR(bool, is_requirable = false);
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ASIO_STATIC_CONSTEXPR(bool, is_preferable = false);
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typedef relationship_t polymorphic_query_result_type;
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typedef detail::relationship::fork_t<I> fork_t;
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typedef detail::relationship::continuation_t<I> continuation_t;
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ASIO_CONSTEXPR relationship_t()
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: value_(-1)
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{
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}
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ASIO_CONSTEXPR relationship_t(fork_t)
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: value_(0)
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{
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}
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ASIO_CONSTEXPR relationship_t(continuation_t)
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: value_(1)
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{
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}
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template <typename T>
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struct proxy
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{
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#if defined(ASIO_HAS_DEDUCED_QUERY_MEMBER_TRAIT)
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struct type
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{
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template <typename P>
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auto query(ASIO_MOVE_ARG(P) p) const
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noexcept(
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noexcept(
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declval<typename conditional<true, T, P>::type>().query(
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ASIO_MOVE_CAST(P)(p))
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)
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)
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-> decltype(
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declval<typename conditional<true, T, P>::type>().query(
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ASIO_MOVE_CAST(P)(p))
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);
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};
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#else // defined(ASIO_HAS_DEDUCED_QUERY_MEMBER_TRAIT)
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typedef T type;
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#endif // defined(ASIO_HAS_DEDUCED_QUERY_MEMBER_TRAIT)
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};
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template <typename T>
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struct static_proxy
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{
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#if defined(ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT)
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struct type
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{
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template <typename P>
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static constexpr auto query(ASIO_MOVE_ARG(P) p)
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noexcept(
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noexcept(
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conditional<true, T, P>::type::query(ASIO_MOVE_CAST(P)(p))
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)
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)
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-> decltype(
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conditional<true, T, P>::type::query(ASIO_MOVE_CAST(P)(p))
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)
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{
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return T::query(ASIO_MOVE_CAST(P)(p));
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}
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};
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#else // defined(ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT)
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typedef T type;
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#endif // defined(ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT)
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};
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template <typename T>
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struct query_member :
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traits::query_member<typename proxy<T>::type, relationship_t> {};
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template <typename T>
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struct query_static_constexpr_member :
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traits::query_static_constexpr_member<
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typename static_proxy<T>::type, relationship_t> {};
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#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
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&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
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template <typename T>
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static ASIO_CONSTEXPR
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typename query_static_constexpr_member<T>::result_type
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static_query()
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ASIO_NOEXCEPT_IF((
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query_static_constexpr_member<T>::is_noexcept))
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{
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return query_static_constexpr_member<T>::value();
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}
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template <typename T>
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static ASIO_CONSTEXPR
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typename traits::static_query<T, fork_t>::result_type
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static_query(
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typename enable_if<
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!query_static_constexpr_member<T>::is_valid
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>::type* = 0,
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typename enable_if<
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!query_member<T>::is_valid
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>::type* = 0,
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typename enable_if<
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traits::static_query<T, fork_t>::is_valid
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>::type* = 0) ASIO_NOEXCEPT
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{
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return traits::static_query<T, fork_t>::value();
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}
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template <typename T>
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static ASIO_CONSTEXPR
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typename traits::static_query<T, continuation_t>::result_type
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static_query(
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typename enable_if<
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!query_static_constexpr_member<T>::is_valid
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>::type* = 0,
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typename enable_if<
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!query_member<T>::is_valid
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>::type* = 0,
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typename enable_if<
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!traits::static_query<T, fork_t>::is_valid
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>::type* = 0,
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typename enable_if<
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traits::static_query<T, continuation_t>::is_valid
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>::type* = 0) ASIO_NOEXCEPT
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{
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return traits::static_query<T, continuation_t>::value();
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}
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template <typename E,
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typename T = decltype(relationship_t::static_query<E>())>
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static ASIO_CONSTEXPR const T static_query_v
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= relationship_t::static_query<E>();
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#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
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// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
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friend ASIO_CONSTEXPR bool operator==(
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const relationship_t& a, const relationship_t& b)
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{
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return a.value_ == b.value_;
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}
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friend ASIO_CONSTEXPR bool operator!=(
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const relationship_t& a, const relationship_t& b)
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{
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return a.value_ != b.value_;
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}
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struct convertible_from_relationship_t
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{
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ASIO_CONSTEXPR convertible_from_relationship_t(relationship_t)
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{
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}
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};
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template <typename Executor>
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friend ASIO_CONSTEXPR relationship_t query(
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const Executor& ex, convertible_from_relationship_t,
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typename enable_if<
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can_query<const Executor&, fork_t>::value
|
||
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>::type* = 0)
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#if !defined(__clang__) // Clang crashes if noexcept is used here.
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#if defined(ASIO_MSVC) // Visual C++ wants the type to be qualified.
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||
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ASIO_NOEXCEPT_IF((
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is_nothrow_query<const Executor&, relationship_t<>::fork_t>::value))
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#else // defined(ASIO_MSVC)
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||
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ASIO_NOEXCEPT_IF((
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is_nothrow_query<const Executor&, fork_t>::value))
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||
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#endif // defined(ASIO_MSVC)
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#endif // !defined(__clang__)
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{
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return asio::query(ex, fork_t());
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}
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||
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template <typename Executor>
|
||
|
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friend ASIO_CONSTEXPR relationship_t query(
|
||
|
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const Executor& ex, convertible_from_relationship_t,
|
||
|
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typename enable_if<
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||
|
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!can_query<const Executor&, fork_t>::value
|
||
|
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>::type* = 0,
|
||
|
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typename enable_if<
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can_query<const Executor&, continuation_t>::value
|
||
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>::type* = 0)
|
||
|
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#if !defined(__clang__) // Clang crashes if noexcept is used here.
|
||
|
|
#if defined(ASIO_MSVC) // Visual C++ wants the type to be qualified.
|
||
|
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ASIO_NOEXCEPT_IF((
|
||
|
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is_nothrow_query<const Executor&,
|
||
|
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relationship_t<>::continuation_t>::value))
|
||
|
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#else // defined(ASIO_MSVC)
|
||
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ASIO_NOEXCEPT_IF((
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||
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is_nothrow_query<const Executor&, continuation_t>::value))
|
||
|
|
#endif // defined(ASIO_MSVC)
|
||
|
|
#endif // !defined(__clang__)
|
||
|
|
{
|
||
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return asio::query(ex, continuation_t());
|
||
|
|
}
|
||
|
|
|
||
|
|
ASIO_STATIC_CONSTEXPR_DEFAULT_INIT(fork_t, fork);
|
||
|
|
ASIO_STATIC_CONSTEXPR_DEFAULT_INIT(continuation_t, continuation);
|
||
|
|
|
||
|
|
#if !defined(ASIO_HAS_CONSTEXPR)
|
||
|
|
static const relationship_t instance;
|
||
|
|
#endif // !defined(ASIO_HAS_CONSTEXPR)
|
||
|
|
|
||
|
|
private:
|
||
|
|
int value_;
|
||
|
|
};
|
||
|
|
|
||
|
|
#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
|
||
|
|
&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
||
|
|
template <int I> template <typename E, typename T>
|
||
|
|
const T relationship_t<I>::static_query_v;
|
||
|
|
#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
|
||
|
|
// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
||
|
|
|
||
|
|
#if !defined(ASIO_HAS_CONSTEXPR)
|
||
|
|
template <int I>
|
||
|
|
const relationship_t<I> relationship_t<I>::instance;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
template <int I>
|
||
|
|
const typename relationship_t<I>::fork_t
|
||
|
|
relationship_t<I>::fork;
|
||
|
|
|
||
|
|
template <int I>
|
||
|
|
const typename relationship_t<I>::continuation_t
|
||
|
|
relationship_t<I>::continuation;
|
||
|
|
|
||
|
|
namespace relationship {
|
||
|
|
|
||
|
|
template <int I = 0>
|
||
|
|
struct fork_t
|
||
|
|
{
|
||
|
|
#if defined(ASIO_HAS_VARIABLE_TEMPLATES)
|
||
|
|
# if defined(ASIO_NO_DEPRECATED)
|
||
|
|
template <typename T>
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool,
|
||
|
|
is_applicable_property_v = (
|
||
|
|
is_executor<T>::value));
|
||
|
|
# else // defined(ASIO_NO_DEPRECATED)
|
||
|
|
template <typename T>
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool,
|
||
|
|
is_applicable_property_v = (
|
||
|
|
is_executor<T>::value
|
||
|
|
|| conditional<
|
||
|
|
is_executor<T>::value,
|
||
|
|
false_type,
|
||
|
|
is_sender<T>
|
||
|
|
>::type::value
|
||
|
|
|| conditional<
|
||
|
|
is_executor<T>::value,
|
||
|
|
false_type,
|
||
|
|
is_scheduler<T>
|
||
|
|
>::type::value
|
||
|
|
));
|
||
|
|
# endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES)
|
||
|
|
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_requirable = true);
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_preferable = true);
|
||
|
|
typedef relationship_t<I> polymorphic_query_result_type;
|
||
|
|
|
||
|
|
ASIO_CONSTEXPR fork_t()
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
struct query_member :
|
||
|
|
traits::query_member<
|
||
|
|
typename relationship_t<I>::template proxy<T>::type, fork_t> {};
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
struct query_static_constexpr_member :
|
||
|
|
traits::query_static_constexpr_member<
|
||
|
|
typename relationship_t<I>::template static_proxy<T>::type, fork_t> {};
|
||
|
|
|
||
|
|
#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
|
||
|
|
&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
||
|
|
template <typename T>
|
||
|
|
static ASIO_CONSTEXPR
|
||
|
|
typename query_static_constexpr_member<T>::result_type
|
||
|
|
static_query()
|
||
|
|
ASIO_NOEXCEPT_IF((
|
||
|
|
query_static_constexpr_member<T>::is_noexcept))
|
||
|
|
{
|
||
|
|
return query_static_constexpr_member<T>::value();
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
static ASIO_CONSTEXPR fork_t static_query(
|
||
|
|
typename enable_if<
|
||
|
|
!query_static_constexpr_member<T>::is_valid
|
||
|
|
>::type* = 0,
|
||
|
|
typename enable_if<
|
||
|
|
!query_member<T>::is_valid
|
||
|
|
>::type* = 0,
|
||
|
|
typename enable_if<
|
||
|
|
!traits::query_free<T, fork_t>::is_valid
|
||
|
|
>::type* = 0,
|
||
|
|
typename enable_if<
|
||
|
|
!can_query<T, continuation_t<I> >::value
|
||
|
|
>::type* = 0) ASIO_NOEXCEPT
|
||
|
|
{
|
||
|
|
return fork_t();
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename E, typename T = decltype(fork_t::static_query<E>())>
|
||
|
|
static ASIO_CONSTEXPR const T static_query_v
|
||
|
|
= fork_t::static_query<E>();
|
||
|
|
#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
|
||
|
|
// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
||
|
|
|
||
|
|
static ASIO_CONSTEXPR relationship_t<I> value()
|
||
|
|
{
|
||
|
|
return fork_t();
|
||
|
|
}
|
||
|
|
|
||
|
|
friend ASIO_CONSTEXPR bool operator==(
|
||
|
|
const fork_t&, const fork_t&)
|
||
|
|
{
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
friend ASIO_CONSTEXPR bool operator!=(
|
||
|
|
const fork_t&, const fork_t&)
|
||
|
|
{
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
|
||
|
|
&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
||
|
|
template <int I> template <typename E, typename T>
|
||
|
|
const T fork_t<I>::static_query_v;
|
||
|
|
#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
|
||
|
|
// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
||
|
|
|
||
|
|
template <int I = 0>
|
||
|
|
struct continuation_t
|
||
|
|
{
|
||
|
|
#if defined(ASIO_HAS_VARIABLE_TEMPLATES)
|
||
|
|
# if defined(ASIO_NO_DEPRECATED)
|
||
|
|
template <typename T>
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool,
|
||
|
|
is_applicable_property_v = (
|
||
|
|
is_executor<T>::value));
|
||
|
|
# else // defined(ASIO_NO_DEPRECATED)
|
||
|
|
template <typename T>
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool,
|
||
|
|
is_applicable_property_v = (
|
||
|
|
is_executor<T>::value
|
||
|
|
|| conditional<
|
||
|
|
is_executor<T>::value,
|
||
|
|
false_type,
|
||
|
|
is_sender<T>
|
||
|
|
>::type::value
|
||
|
|
|| conditional<
|
||
|
|
is_executor<T>::value,
|
||
|
|
false_type,
|
||
|
|
is_scheduler<T>
|
||
|
|
>::type::value
|
||
|
|
));
|
||
|
|
# endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES)
|
||
|
|
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_requirable = true);
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_preferable = true);
|
||
|
|
typedef relationship_t<I> polymorphic_query_result_type;
|
||
|
|
|
||
|
|
ASIO_CONSTEXPR continuation_t()
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
struct query_member :
|
||
|
|
traits::query_member<
|
||
|
|
typename relationship_t<I>::template proxy<T>::type, continuation_t> {};
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
struct query_static_constexpr_member :
|
||
|
|
traits::query_static_constexpr_member<
|
||
|
|
typename relationship_t<I>::template static_proxy<T>::type,
|
||
|
|
continuation_t> {};
|
||
|
|
|
||
|
|
#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
|
||
|
|
&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
||
|
|
template <typename T>
|
||
|
|
static ASIO_CONSTEXPR
|
||
|
|
typename query_static_constexpr_member<T>::result_type
|
||
|
|
static_query()
|
||
|
|
ASIO_NOEXCEPT_IF((
|
||
|
|
query_static_constexpr_member<T>::is_noexcept))
|
||
|
|
{
|
||
|
|
return query_static_constexpr_member<T>::value();
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename E,
|
||
|
|
typename T = decltype(continuation_t::static_query<E>())>
|
||
|
|
static ASIO_CONSTEXPR const T static_query_v
|
||
|
|
= continuation_t::static_query<E>();
|
||
|
|
#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
|
||
|
|
// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
||
|
|
|
||
|
|
static ASIO_CONSTEXPR relationship_t<I> value()
|
||
|
|
{
|
||
|
|
return continuation_t();
|
||
|
|
}
|
||
|
|
|
||
|
|
friend ASIO_CONSTEXPR bool operator==(
|
||
|
|
const continuation_t&, const continuation_t&)
|
||
|
|
{
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
friend ASIO_CONSTEXPR bool operator!=(
|
||
|
|
const continuation_t&, const continuation_t&)
|
||
|
|
{
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
|
||
|
|
&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
||
|
|
template <int I> template <typename E, typename T>
|
||
|
|
const T continuation_t<I>::static_query_v;
|
||
|
|
#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
|
||
|
|
// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
||
|
|
|
||
|
|
} // namespace relationship
|
||
|
|
} // namespace detail
|
||
|
|
|
||
|
|
typedef detail::relationship_t<> relationship_t;
|
||
|
|
|
||
|
|
#if defined(ASIO_HAS_CONSTEXPR) || defined(GENERATING_DOCUMENTATION)
|
||
|
|
constexpr relationship_t relationship;
|
||
|
|
#else // defined(ASIO_HAS_CONSTEXPR) || defined(GENERATING_DOCUMENTATION)
|
||
|
|
namespace { static const relationship_t&
|
||
|
|
relationship = relationship_t::instance; }
|
||
|
|
#endif
|
||
|
|
|
||
|
|
} // namespace execution
|
||
|
|
|
||
|
|
#if !defined(ASIO_HAS_VARIABLE_TEMPLATES)
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
struct is_applicable_property<T, execution::relationship_t>
|
||
|
|
: integral_constant<bool,
|
||
|
|
execution::is_executor<T>::value
|
||
|
|
#if !defined(ASIO_NO_DEPRECATED)
|
||
|
|
|| conditional<
|
||
|
|
execution::is_executor<T>::value,
|
||
|
|
false_type,
|
||
|
|
execution::is_sender<T>
|
||
|
|
>::type::value
|
||
|
|
|| conditional<
|
||
|
|
execution::is_executor<T>::value,
|
||
|
|
false_type,
|
||
|
|
execution::is_scheduler<T>
|
||
|
|
>::type::value
|
||
|
|
#endif // !defined(ASIO_NO_DEPRECATED)
|
||
|
|
>
|
||
|
|
{
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
struct is_applicable_property<T, execution::relationship_t::fork_t>
|
||
|
|
: integral_constant<bool,
|
||
|
|
execution::is_executor<T>::value
|
||
|
|
#if !defined(ASIO_NO_DEPRECATED)
|
||
|
|
|| conditional<
|
||
|
|
execution::is_executor<T>::value,
|
||
|
|
false_type,
|
||
|
|
execution::is_sender<T>
|
||
|
|
>::type::value
|
||
|
|
|| conditional<
|
||
|
|
execution::is_executor<T>::value,
|
||
|
|
false_type,
|
||
|
|
execution::is_scheduler<T>
|
||
|
|
>::type::value
|
||
|
|
#endif // !defined(ASIO_NO_DEPRECATED)
|
||
|
|
>
|
||
|
|
{
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
struct is_applicable_property<T, execution::relationship_t::continuation_t>
|
||
|
|
: integral_constant<bool,
|
||
|
|
execution::is_executor<T>::value
|
||
|
|
#if !defined(ASIO_NO_DEPRECATED)
|
||
|
|
|| conditional<
|
||
|
|
execution::is_executor<T>::value,
|
||
|
|
false_type,
|
||
|
|
execution::is_sender<T>
|
||
|
|
>::type::value
|
||
|
|
|| conditional<
|
||
|
|
execution::is_executor<T>::value,
|
||
|
|
false_type,
|
||
|
|
execution::is_scheduler<T>
|
||
|
|
>::type::value
|
||
|
|
#endif // !defined(ASIO_NO_DEPRECATED)
|
||
|
|
>
|
||
|
|
{
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // !defined(ASIO_HAS_VARIABLE_TEMPLATES)
|
||
|
|
|
||
|
|
namespace traits {
|
||
|
|
|
||
|
|
#if !defined(ASIO_HAS_DEDUCED_QUERY_FREE_TRAIT)
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
struct query_free_default<T, execution::relationship_t,
|
||
|
|
typename enable_if<
|
||
|
|
can_query<T, execution::relationship_t::fork_t>::value
|
||
|
|
>::type>
|
||
|
|
{
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept =
|
||
|
|
(is_nothrow_query<T, execution::relationship_t::fork_t>::value));
|
||
|
|
|
||
|
|
typedef execution::relationship_t result_type;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
struct query_free_default<T, execution::relationship_t,
|
||
|
|
typename enable_if<
|
||
|
|
!can_query<T, execution::relationship_t::fork_t>::value
|
||
|
|
&& can_query<T, execution::relationship_t::continuation_t>::value
|
||
|
|
>::type>
|
||
|
|
{
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept =
|
||
|
|
(is_nothrow_query<T, execution::relationship_t::continuation_t>::value));
|
||
|
|
|
||
|
|
typedef execution::relationship_t result_type;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // !defined(ASIO_HAS_DEDUCED_QUERY_FREE_TRAIT)
|
||
|
|
|
||
|
|
#if !defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
|
||
|
|
|| !defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
struct static_query<T, execution::relationship_t,
|
||
|
|
typename enable_if<
|
||
|
|
execution::detail::relationship_t<0>::
|
||
|
|
query_static_constexpr_member<T>::is_valid
|
||
|
|
>::type>
|
||
|
|
{
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
||
|
|
|
||
|
|
typedef typename execution::detail::relationship_t<0>::
|
||
|
|
query_static_constexpr_member<T>::result_type result_type;
|
||
|
|
|
||
|
|
static ASIO_CONSTEXPR result_type value()
|
||
|
|
{
|
||
|
|
return execution::detail::relationship_t<0>::
|
||
|
|
query_static_constexpr_member<T>::value();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
struct static_query<T, execution::relationship_t,
|
||
|
|
typename enable_if<
|
||
|
|
!execution::detail::relationship_t<0>::
|
||
|
|
query_static_constexpr_member<T>::is_valid
|
||
|
|
&& !execution::detail::relationship_t<0>::
|
||
|
|
query_member<T>::is_valid
|
||
|
|
&& traits::static_query<T,
|
||
|
|
execution::relationship_t::fork_t>::is_valid
|
||
|
|
>::type>
|
||
|
|
{
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
||
|
|
|
||
|
|
typedef typename traits::static_query<T,
|
||
|
|
execution::relationship_t::fork_t>::result_type result_type;
|
||
|
|
|
||
|
|
static ASIO_CONSTEXPR result_type value()
|
||
|
|
{
|
||
|
|
return traits::static_query<T,
|
||
|
|
execution::relationship_t::fork_t>::value();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
struct static_query<T, execution::relationship_t,
|
||
|
|
typename enable_if<
|
||
|
|
!execution::detail::relationship_t<0>::
|
||
|
|
query_static_constexpr_member<T>::is_valid
|
||
|
|
&& !execution::detail::relationship_t<0>::
|
||
|
|
query_member<T>::is_valid
|
||
|
|
&& !traits::static_query<T,
|
||
|
|
execution::relationship_t::fork_t>::is_valid
|
||
|
|
&& traits::static_query<T,
|
||
|
|
execution::relationship_t::continuation_t>::is_valid
|
||
|
|
>::type>
|
||
|
|
{
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
||
|
|
|
||
|
|
typedef typename traits::static_query<T,
|
||
|
|
execution::relationship_t::continuation_t>::result_type result_type;
|
||
|
|
|
||
|
|
static ASIO_CONSTEXPR result_type value()
|
||
|
|
{
|
||
|
|
return traits::static_query<T,
|
||
|
|
execution::relationship_t::continuation_t>::value();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
struct static_query<T, execution::relationship_t::fork_t,
|
||
|
|
typename enable_if<
|
||
|
|
execution::detail::relationship::fork_t<0>::
|
||
|
|
query_static_constexpr_member<T>::is_valid
|
||
|
|
>::type>
|
||
|
|
{
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
||
|
|
|
||
|
|
typedef typename execution::detail::relationship::fork_t<0>::
|
||
|
|
query_static_constexpr_member<T>::result_type result_type;
|
||
|
|
|
||
|
|
static ASIO_CONSTEXPR result_type value()
|
||
|
|
{
|
||
|
|
return execution::detail::relationship::fork_t<0>::
|
||
|
|
query_static_constexpr_member<T>::value();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
struct static_query<T, execution::relationship_t::fork_t,
|
||
|
|
typename enable_if<
|
||
|
|
!execution::detail::relationship::fork_t<0>::
|
||
|
|
query_static_constexpr_member<T>::is_valid
|
||
|
|
&& !execution::detail::relationship::fork_t<0>::
|
||
|
|
query_member<T>::is_valid
|
||
|
|
&& !traits::query_free<T,
|
||
|
|
execution::relationship_t::fork_t>::is_valid
|
||
|
|
&& !can_query<T, execution::relationship_t::continuation_t>::value
|
||
|
|
>::type>
|
||
|
|
{
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
||
|
|
|
||
|
|
typedef execution::relationship_t::fork_t result_type;
|
||
|
|
|
||
|
|
static ASIO_CONSTEXPR result_type value()
|
||
|
|
{
|
||
|
|
return result_type();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
struct static_query<T, execution::relationship_t::continuation_t,
|
||
|
|
typename enable_if<
|
||
|
|
execution::detail::relationship::continuation_t<0>::
|
||
|
|
query_static_constexpr_member<T>::is_valid
|
||
|
|
>::type>
|
||
|
|
{
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
|
||
|
|
|
||
|
|
typedef typename execution::detail::relationship::continuation_t<0>::
|
||
|
|
query_static_constexpr_member<T>::result_type result_type;
|
||
|
|
|
||
|
|
static ASIO_CONSTEXPR result_type value()
|
||
|
|
{
|
||
|
|
return execution::detail::relationship::continuation_t<0>::
|
||
|
|
query_static_constexpr_member<T>::value();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // !defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
|
||
|
|
// || !defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
|
||
|
|
|
||
|
|
#if !defined(ASIO_HAS_DEDUCED_STATIC_REQUIRE_TRAIT)
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
struct static_require<T, execution::relationship_t::fork_t,
|
||
|
|
typename enable_if<
|
||
|
|
static_query<T, execution::relationship_t::fork_t>::is_valid
|
||
|
|
>::type>
|
||
|
|
{
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid =
|
||
|
|
(is_same<typename static_query<T,
|
||
|
|
execution::relationship_t::fork_t>::result_type,
|
||
|
|
execution::relationship_t::fork_t>::value));
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
struct static_require<T, execution::relationship_t::continuation_t,
|
||
|
|
typename enable_if<
|
||
|
|
static_query<T, execution::relationship_t::continuation_t>::is_valid
|
||
|
|
>::type>
|
||
|
|
{
|
||
|
|
ASIO_STATIC_CONSTEXPR(bool, is_valid =
|
||
|
|
(is_same<typename static_query<T,
|
||
|
|
execution::relationship_t::continuation_t>::result_type,
|
||
|
|
execution::relationship_t::continuation_t>::value));
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // !defined(ASIO_HAS_DEDUCED_STATIC_REQUIRE_TRAIT)
|
||
|
|
|
||
|
|
} // namespace traits
|
||
|
|
|
||
|
|
#endif // defined(GENERATING_DOCUMENTATION)
|
||
|
|
|
||
|
|
} // namespace asio
|
||
|
|
|
||
|
|
#include "asio/detail/pop_options.hpp"
|
||
|
|
|
||
|
|
#endif // ASIO_EXECUTION_RELATIONSHIP_HPP
|