| // |
| // execution/outstanding_work.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2021 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_OUTSTANDING_WORK_HPP |
| #define ASIO_EXECUTION_OUTSTANDING_WORK_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/execution/executor.hpp" |
| #include "asio/execution/scheduler.hpp" |
| #include "asio/execution/sender.hpp" |
| #include "asio/is_applicable_property.hpp" |
| #include "asio/query.hpp" |
| #include "asio/traits/query_free.hpp" |
| #include "asio/traits/query_member.hpp" |
| #include "asio/traits/query_static_constexpr_member.hpp" |
| #include "asio/traits/static_query.hpp" |
| #include "asio/traits/static_require.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| |
| namespace asio { |
| |
| #if defined(GENERATING_DOCUMENTATION) |
| |
| namespace execution { |
| |
| /// A property to describe whether task submission is likely in the future. |
| struct outstanding_work_t |
| { |
| /// The outstanding_work_t property applies to executors, senders, and |
| /// schedulers. |
| template <typename T> |
| static constexpr bool is_applicable_property_v = |
| is_executor_v<T> || is_sender_v<T> || is_scheduler_v<T>; |
| |
| /// The top-level outstanding_work_t property cannot be required. |
| static constexpr bool is_requirable = false; |
| |
| /// The top-level outstanding_work_t property cannot be preferred. |
| static constexpr bool is_preferable = false; |
| |
| /// The type returned by queries against an @c any_executor. |
| typedef outstanding_work_t polymorphic_query_result_type; |
| |
| /// A sub-property that indicates that the executor does not represent likely |
| /// future submission of a function object. |
| struct untracked_t |
| { |
| /// The outstanding_work_t::untracked_t property applies to executors, |
| /// senders, and schedulers. |
| template <typename T> |
| static constexpr bool is_applicable_property_v = |
| is_executor_v<T> || is_sender_v<T> || is_scheduler_v<T>; |
| |
| /// The outstanding_work_t::untracked_t property can be required. |
| static constexpr bool is_requirable = true; |
| |
| /// The outstanding_work_t::untracked_t property can be preferred. |
| static constexpr bool is_preferable = true; |
| |
| /// The type returned by queries against an @c any_executor. |
| typedef outstanding_work_t polymorphic_query_result_type; |
| |
| /// Default constructor. |
| constexpr untracked_t(); |
| |
| /// Get the value associated with a property object. |
| /** |
| * @returns untracked_t(); |
| */ |
| static constexpr outstanding_work_t value(); |
| }; |
| |
| /// A sub-property that indicates that the executor represents likely |
| /// future submission of a function object. |
| struct tracked_t |
| { |
| /// The outstanding_work_t::untracked_t property applies to executors, |
| /// senders, and schedulers. |
| template <typename T> |
| static constexpr bool is_applicable_property_v = |
| is_executor_v<T> || is_sender_v<T> || is_scheduler_v<T>; |
| |
| /// The outstanding_work_t::tracked_t property can be required. |
| static constexpr bool is_requirable = true; |
| |
| /// The outstanding_work_t::tracked_t property can be preferred. |
| static constexpr bool is_preferable = true; |
| |
| /// The type returned by queries against an @c any_executor. |
| typedef outstanding_work_t polymorphic_query_result_type; |
| |
| /// Default constructor. |
| constexpr tracked_t(); |
| |
| /// Get the value associated with a property object. |
| /** |
| * @returns tracked_t(); |
| */ |
| static constexpr outstanding_work_t value(); |
| }; |
| |
| /// A special value used for accessing the outstanding_work_t::untracked_t |
| /// property. |
| static constexpr untracked_t untracked; |
| |
| /// A special value used for accessing the outstanding_work_t::tracked_t |
| /// property. |
| static constexpr tracked_t tracked; |
| |
| /// Default constructor. |
| constexpr outstanding_work_t(); |
| |
| /// Construct from a sub-property value. |
| constexpr outstanding_work_t(untracked_t); |
| |
| /// Construct from a sub-property value. |
| constexpr outstanding_work_t(tracked_t); |
| |
| /// Compare property values for equality. |
| friend constexpr bool operator==( |
| const outstanding_work_t& a, const outstanding_work_t& b) noexcept; |
| |
| /// Compare property values for inequality. |
| friend constexpr bool operator!=( |
| const outstanding_work_t& a, const outstanding_work_t& b) noexcept; |
| }; |
| |
| /// A special value used for accessing the outstanding_work_t property. |
| constexpr outstanding_work_t outstanding_work; |
| |
| } // namespace execution |
| |
| #else // defined(GENERATING_DOCUMENTATION) |
| |
| namespace execution { |
| namespace detail { |
| namespace outstanding_work { |
| |
| template <int I> struct untracked_t; |
| template <int I> struct tracked_t; |
| |
| } // namespace outstanding_work |
| |
| template <int I = 0> |
| struct outstanding_work_t |
| { |
| #if defined(ASIO_HAS_VARIABLE_TEMPLATES) |
| 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_HAS_VARIABLE_TEMPLATES) |
| |
| ASIO_STATIC_CONSTEXPR(bool, is_requirable = false); |
| ASIO_STATIC_CONSTEXPR(bool, is_preferable = false); |
| typedef outstanding_work_t polymorphic_query_result_type; |
| |
| typedef detail::outstanding_work::untracked_t<I> untracked_t; |
| typedef detail::outstanding_work::tracked_t<I> tracked_t; |
| |
| ASIO_CONSTEXPR outstanding_work_t() |
| : value_(-1) |
| { |
| } |
| |
| ASIO_CONSTEXPR outstanding_work_t(untracked_t) |
| : value_(0) |
| { |
| } |
| |
| ASIO_CONSTEXPR outstanding_work_t(tracked_t) |
| : value_(1) |
| { |
| } |
| |
| template <typename T> |
| struct proxy |
| { |
| #if defined(ASIO_HAS_DEDUCED_QUERY_MEMBER_TRAIT) |
| struct type |
| { |
| template <typename P> |
| auto query(ASIO_MOVE_ARG(P) p) const |
| noexcept( |
| noexcept( |
| declval<typename conditional<true, T, P>::type>().query( |
| ASIO_MOVE_CAST(P)(p)) |
| ) |
| ) |
| -> decltype( |
| declval<typename conditional<true, T, P>::type>().query( |
| ASIO_MOVE_CAST(P)(p)) |
| ); |
| }; |
| #else // defined(ASIO_HAS_DEDUCED_QUERY_MEMBER_TRAIT) |
| typedef T type; |
| #endif // defined(ASIO_HAS_DEDUCED_QUERY_MEMBER_TRAIT) |
| }; |
| |
| template <typename T> |
| struct static_proxy |
| { |
| #if defined(ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT) |
| struct type |
| { |
| template <typename P> |
| static constexpr auto query(ASIO_MOVE_ARG(P) p) |
| noexcept( |
| noexcept( |
| conditional<true, T, P>::type::query(ASIO_MOVE_CAST(P)(p)) |
| ) |
| ) |
| -> decltype( |
| conditional<true, T, P>::type::query(ASIO_MOVE_CAST(P)(p)) |
| ) |
| { |
| return T::query(ASIO_MOVE_CAST(P)(p)); |
| } |
| }; |
| #else // defined(ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT) |
| typedef T type; |
| #endif // defined(ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT) |
| }; |
| |
| template <typename T> |
| struct query_member : |
| traits::query_member<typename proxy<T>::type, outstanding_work_t> {}; |
| |
| template <typename T> |
| struct query_static_constexpr_member : |
| traits::query_static_constexpr_member< |
| typename static_proxy<T>::type, outstanding_work_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 |
| typename traits::static_query<T, untracked_t>::result_type |
| 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::static_query<T, untracked_t>::is_valid |
| >::type* = 0) ASIO_NOEXCEPT |
| { |
| return traits::static_query<T, untracked_t>::value(); |
| } |
| |
| template <typename T> |
| static ASIO_CONSTEXPR |
| typename traits::static_query<T, tracked_t>::result_type |
| 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::static_query<T, untracked_t>::is_valid |
| >::type* = 0, |
| typename enable_if< |
| traits::static_query<T, tracked_t>::is_valid |
| >::type* = 0) ASIO_NOEXCEPT |
| { |
| return traits::static_query<T, tracked_t>::value(); |
| } |
| |
| template <typename E, |
| typename T = decltype(outstanding_work_t::static_query<E>())> |
| static ASIO_CONSTEXPR const T static_query_v |
| = outstanding_work_t::static_query<E>(); |
| #endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) |
| // && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) |
| |
| friend ASIO_CONSTEXPR bool operator==( |
| const outstanding_work_t& a, const outstanding_work_t& b) |
| { |
| return a.value_ == b.value_; |
| } |
| |
| friend ASIO_CONSTEXPR bool operator!=( |
| const outstanding_work_t& a, const outstanding_work_t& b) |
| { |
| return a.value_ != b.value_; |
| } |
| |
| struct convertible_from_outstanding_work_t |
| { |
| ASIO_CONSTEXPR convertible_from_outstanding_work_t(outstanding_work_t) |
| { |
| } |
| }; |
| |
| template <typename Executor> |
| friend ASIO_CONSTEXPR outstanding_work_t query( |
| const Executor& ex, convertible_from_outstanding_work_t, |
| typename enable_if< |
| can_query<const Executor&, untracked_t>::value |
| >::type* = 0) |
| #if !defined(__clang__) // Clang crashes if noexcept is used here. |
| #if defined(ASIO_MSVC) // Visual C++ wants the type to be qualified. |
| ASIO_NOEXCEPT_IF(( |
| is_nothrow_query<const Executor&, |
| outstanding_work_t<>::untracked_t>::value)) |
| #else // defined(ASIO_MSVC) |
| ASIO_NOEXCEPT_IF(( |
| is_nothrow_query<const Executor&, untracked_t>::value)) |
| #endif // defined(ASIO_MSVC) |
| #endif // !defined(__clang__) |
| { |
| return asio::query(ex, untracked_t()); |
| } |
| |
| template <typename Executor> |
| friend ASIO_CONSTEXPR outstanding_work_t query( |
| const Executor& ex, convertible_from_outstanding_work_t, |
| typename enable_if< |
| !can_query<const Executor&, untracked_t>::value |
| >::type* = 0, |
| typename enable_if< |
| can_query<const Executor&, tracked_t>::value |
| >::type* = 0) |
| #if !defined(__clang__) // Clang crashes if noexcept is used here. |
| #if defined(ASIO_MSVC) // Visual C++ wants the type to be qualified. |
| ASIO_NOEXCEPT_IF(( |
| is_nothrow_query<const Executor&, |
| outstanding_work_t<>::tracked_t>::value)) |
| #else // defined(ASIO_MSVC) |
| ASIO_NOEXCEPT_IF(( |
| is_nothrow_query<const Executor&, tracked_t>::value)) |
| #endif // defined(ASIO_MSVC) |
| #endif // !defined(__clang__) |
| { |
| return asio::query(ex, tracked_t()); |
| } |
| |
| ASIO_STATIC_CONSTEXPR_DEFAULT_INIT(untracked_t, untracked); |
| ASIO_STATIC_CONSTEXPR_DEFAULT_INIT(tracked_t, tracked); |
| |
| #if !defined(ASIO_HAS_CONSTEXPR) |
| static const outstanding_work_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 outstanding_work_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 outstanding_work_t<I> outstanding_work_t<I>::instance; |
| #endif |
| |
| template <int I> |
| const typename outstanding_work_t<I>::untracked_t |
| outstanding_work_t<I>::untracked; |
| |
| template <int I> |
| const typename outstanding_work_t<I>::tracked_t |
| outstanding_work_t<I>::tracked; |
| |
| namespace outstanding_work { |
| |
| template <int I = 0> |
| struct untracked_t |
| { |
| #if defined(ASIO_HAS_VARIABLE_TEMPLATES) |
| 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_HAS_VARIABLE_TEMPLATES) |
| |
| ASIO_STATIC_CONSTEXPR(bool, is_requirable = true); |
| ASIO_STATIC_CONSTEXPR(bool, is_preferable = true); |
| typedef outstanding_work_t<I> polymorphic_query_result_type; |
| |
| ASIO_CONSTEXPR untracked_t() |
| { |
| } |
| |
| template <typename T> |
| struct query_member : |
| traits::query_member< |
| typename outstanding_work_t<I>::template proxy<T>::type, untracked_t> {}; |
| |
| template <typename T> |
| struct query_static_constexpr_member : |
| traits::query_static_constexpr_member< |
| typename outstanding_work_t<I>::template static_proxy<T>::type, |
| untracked_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 untracked_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, untracked_t>::is_valid |
| >::type* = 0, |
| typename enable_if< |
| !can_query<T, tracked_t<I> >::value |
| >::type* = 0) ASIO_NOEXCEPT |
| { |
| return untracked_t(); |
| } |
| |
| template <typename E, typename T = decltype(untracked_t::static_query<E>())> |
| static ASIO_CONSTEXPR const T static_query_v |
| = untracked_t::static_query<E>(); |
| #endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) |
| // && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) |
| |
| static ASIO_CONSTEXPR outstanding_work_t<I> value() |
| { |
| return untracked_t(); |
| } |
| |
| friend ASIO_CONSTEXPR bool operator==( |
| const untracked_t&, const untracked_t&) |
| { |
| return true; |
| } |
| |
| friend ASIO_CONSTEXPR bool operator!=( |
| const untracked_t&, const untracked_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 untracked_t<I>::static_query_v; |
| #endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) |
| // && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) |
| |
| template <int I = 0> |
| struct tracked_t |
| { |
| #if defined(ASIO_HAS_VARIABLE_TEMPLATES) |
| 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_HAS_VARIABLE_TEMPLATES) |
| |
| ASIO_STATIC_CONSTEXPR(bool, is_requirable = true); |
| ASIO_STATIC_CONSTEXPR(bool, is_preferable = true); |
| typedef outstanding_work_t<I> polymorphic_query_result_type; |
| |
| ASIO_CONSTEXPR tracked_t() |
| { |
| } |
| |
| template <typename T> |
| struct query_member : |
| traits::query_member< |
| typename outstanding_work_t<I>::template proxy<T>::type, tracked_t> {}; |
| |
| template <typename T> |
| struct query_static_constexpr_member : |
| traits::query_static_constexpr_member< |
| typename outstanding_work_t<I>::template static_proxy<T>::type, |
| tracked_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(tracked_t::static_query<E>())> |
| static ASIO_CONSTEXPR const T static_query_v |
| = tracked_t::static_query<E>(); |
| #endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) |
| // && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) |
| |
| static ASIO_CONSTEXPR outstanding_work_t<I> value() |
| { |
| return tracked_t(); |
| } |
| |
| friend ASIO_CONSTEXPR bool operator==( |
| const tracked_t&, const tracked_t&) |
| { |
| return true; |
| } |
| |
| friend ASIO_CONSTEXPR bool operator!=( |
| const tracked_t&, const tracked_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 tracked_t<I>::static_query_v; |
| #endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) |
| // && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) |
| |
| } // namespace outstanding_work |
| } // namespace detail |
| |
| typedef detail::outstanding_work_t<> outstanding_work_t; |
| |
| #if defined(ASIO_HAS_CONSTEXPR) || defined(GENERATING_DOCUMENTATION) |
| constexpr outstanding_work_t outstanding_work; |
| #else // defined(ASIO_HAS_CONSTEXPR) || defined(GENERATING_DOCUMENTATION) |
| namespace { static const outstanding_work_t& |
| outstanding_work = outstanding_work_t::instance; } |
| #endif |
| |
| } // namespace execution |
| |
| #if !defined(ASIO_HAS_VARIABLE_TEMPLATES) |
| |
| template <typename T> |
| struct is_applicable_property<T, execution::outstanding_work_t> |
| : integral_constant<bool, |
| execution::is_executor<T>::value |
| || 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> |
| { |
| }; |
| |
| template <typename T> |
| struct is_applicable_property<T, execution::outstanding_work_t::untracked_t> |
| : integral_constant<bool, |
| execution::is_executor<T>::value |
| || 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> |
| { |
| }; |
| |
| template <typename T> |
| struct is_applicable_property<T, execution::outstanding_work_t::tracked_t> |
| : integral_constant<bool, |
| execution::is_executor<T>::value |
| || 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_HAS_VARIABLE_TEMPLATES) |
| |
| namespace traits { |
| |
| #if !defined(ASIO_HAS_DEDUCED_QUERY_FREE_TRAIT) |
| |
| template <typename T> |
| struct query_free_default<T, execution::outstanding_work_t, |
| typename enable_if< |
| can_query<T, execution::outstanding_work_t::untracked_t>::value |
| >::type> |
| { |
| ASIO_STATIC_CONSTEXPR(bool, is_valid = true); |
| ASIO_STATIC_CONSTEXPR(bool, is_noexcept = |
| (is_nothrow_query<T, execution::outstanding_work_t::untracked_t>::value)); |
| |
| typedef execution::outstanding_work_t result_type; |
| }; |
| |
| template <typename T> |
| struct query_free_default<T, execution::outstanding_work_t, |
| typename enable_if< |
| !can_query<T, execution::outstanding_work_t::untracked_t>::value |
| && can_query<T, execution::outstanding_work_t::tracked_t>::value |
| >::type> |
| { |
| ASIO_STATIC_CONSTEXPR(bool, is_valid = true); |
| ASIO_STATIC_CONSTEXPR(bool, is_noexcept = |
| (is_nothrow_query<T, execution::outstanding_work_t::tracked_t>::value)); |
| |
| typedef execution::outstanding_work_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::outstanding_work_t, |
| typename enable_if< |
| execution::detail::outstanding_work_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::outstanding_work_t<0>:: |
| query_static_constexpr_member<T>::result_type result_type; |
| |
| static ASIO_CONSTEXPR result_type value() |
| { |
| return execution::detail::outstanding_work_t<0>:: |
| query_static_constexpr_member<T>::value(); |
| } |
| }; |
| |
| template <typename T> |
| struct static_query<T, execution::outstanding_work_t, |
| typename enable_if< |
| !execution::detail::outstanding_work_t<0>:: |
| query_static_constexpr_member<T>::is_valid |
| && !execution::detail::outstanding_work_t<0>:: |
| query_member<T>::is_valid |
| && traits::static_query<T, |
| execution::outstanding_work_t::untracked_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::outstanding_work_t::untracked_t>::result_type result_type; |
| |
| static ASIO_CONSTEXPR result_type value() |
| { |
| return traits::static_query<T, |
| execution::outstanding_work_t::untracked_t>::value(); |
| } |
| }; |
| |
| template <typename T> |
| struct static_query<T, execution::outstanding_work_t, |
| typename enable_if< |
| !execution::detail::outstanding_work_t<0>:: |
| query_static_constexpr_member<T>::is_valid |
| && !execution::detail::outstanding_work_t<0>:: |
| query_member<T>::is_valid |
| && !traits::static_query<T, |
| execution::outstanding_work_t::untracked_t>::is_valid |
| && traits::static_query<T, |
| execution::outstanding_work_t::tracked_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::outstanding_work_t::tracked_t>::result_type result_type; |
| |
| static ASIO_CONSTEXPR result_type value() |
| { |
| return traits::static_query<T, |
| execution::outstanding_work_t::tracked_t>::value(); |
| } |
| }; |
| |
| template <typename T> |
| struct static_query<T, execution::outstanding_work_t::untracked_t, |
| typename enable_if< |
| execution::detail::outstanding_work::untracked_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::outstanding_work::untracked_t<0>:: |
| query_static_constexpr_member<T>::result_type result_type; |
| |
| static ASIO_CONSTEXPR result_type value() |
| { |
| return execution::detail::outstanding_work::untracked_t<0>:: |
| query_static_constexpr_member<T>::value(); |
| } |
| }; |
| |
| template <typename T> |
| struct static_query<T, execution::outstanding_work_t::untracked_t, |
| typename enable_if< |
| !execution::detail::outstanding_work::untracked_t<0>:: |
| query_static_constexpr_member<T>::is_valid |
| && !execution::detail::outstanding_work::untracked_t<0>:: |
| query_member<T>::is_valid |
| && !traits::query_free<T, |
| execution::outstanding_work_t::untracked_t>::is_valid |
| && !can_query<T, execution::outstanding_work_t::tracked_t>::value |
| >::type> |
| { |
| ASIO_STATIC_CONSTEXPR(bool, is_valid = true); |
| ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true); |
| |
| typedef execution::outstanding_work_t::untracked_t result_type; |
| |
| static ASIO_CONSTEXPR result_type value() |
| { |
| return result_type(); |
| } |
| }; |
| |
| template <typename T> |
| struct static_query<T, execution::outstanding_work_t::tracked_t, |
| typename enable_if< |
| execution::detail::outstanding_work::tracked_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::outstanding_work::tracked_t<0>:: |
| query_static_constexpr_member<T>::result_type result_type; |
| |
| static ASIO_CONSTEXPR result_type value() |
| { |
| return execution::detail::outstanding_work::tracked_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::outstanding_work_t::untracked_t, |
| typename enable_if< |
| static_query<T, execution::outstanding_work_t::untracked_t>::is_valid |
| >::type> |
| { |
| ASIO_STATIC_CONSTEXPR(bool, is_valid = |
| (is_same<typename static_query<T, |
| execution::outstanding_work_t::untracked_t>::result_type, |
| execution::outstanding_work_t::untracked_t>::value)); |
| }; |
| |
| template <typename T> |
| struct static_require<T, execution::outstanding_work_t::tracked_t, |
| typename enable_if< |
| static_query<T, execution::outstanding_work_t::tracked_t>::is_valid |
| >::type> |
| { |
| ASIO_STATIC_CONSTEXPR(bool, is_valid = |
| (is_same<typename static_query<T, |
| execution::outstanding_work_t::tracked_t>::result_type, |
| execution::outstanding_work_t::tracked_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_OUTSTANDING_WORK_HPP |
