update boost

linx64/include/boost/asio/execution/context.hpp

@@ -0,0 +1,246 @@
+//
+// execution/context.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 BOOST_ASIO_EXECUTION_CONTEXT2_HPP
+#define BOOST_ASIO_EXECUTION_CONTEXT2_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/config.hpp>
+#include <boost/asio/detail/type_traits.hpp>
+#include <boost/asio/execution/executor.hpp>
+#include <boost/asio/execution/scheduler.hpp>
+#include <boost/asio/execution/sender.hpp>
+#include <boost/asio/is_applicable_property.hpp>
+#include <boost/asio/traits/query_static_constexpr_member.hpp>
+#include <boost/asio/traits/static_query.hpp>
+
+#if defined(BOOST_ASIO_HAS_STD_ANY)
+# include <any>
+#endif // defined(BOOST_ASIO_HAS_STD_ANY)
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+
+#if defined(GENERATING_DOCUMENTATION)
+
+namespace execution {
+
+/// A property that is used to obtain the execution context that is associated
+/// with an executor.
+struct context_t
+{
+  /// The context_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 context_t property cannot be required.
+  static constexpr bool is_requirable = false;
+
+  /// The context_t property cannot be preferred.
+  static constexpr bool is_preferable = false;
+
+  /// The type returned by queries against an @c any_executor.
+  typedef std::any polymorphic_query_result_type;
+};
+
+/// A special value used for accessing the context_t property.
+constexpr context_t context;
+
+} // namespace execution
+
+#else // defined(GENERATING_DOCUMENTATION)
+
+namespace execution {
+namespace detail {
+
+template <int I = 0>
+struct context_t
+{
+#if defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)
+# if defined(BOOST_ASIO_NO_DEPRECATED)
+  template <typename T>
+  BOOST_ASIO_STATIC_CONSTEXPR(bool,
+    is_applicable_property_v = (
+      is_executor<T>::value));
+# else // defined(BOOST_ASIO_NO_DEPRECATED)
+  template <typename T>
+  BOOST_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(BOOST_ASIO_NO_DEPRECATED)
+#endif // defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)
+
+  BOOST_ASIO_STATIC_CONSTEXPR(bool, is_requirable = false);
+  BOOST_ASIO_STATIC_CONSTEXPR(bool, is_preferable = false);
+
+#if defined(BOOST_ASIO_HAS_STD_ANY)
+  typedef std::any polymorphic_query_result_type;
+#endif // defined(BOOST_ASIO_HAS_STD_ANY)
+
+  BOOST_ASIO_CONSTEXPR context_t()
+  {
+  }
+
+  template <typename T>
+  struct static_proxy
+  {
+#if defined(BOOST_ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT)
+    struct type
+    {
+      template <typename P>
+      static constexpr auto query(BOOST_ASIO_MOVE_ARG(P) p)
+        noexcept(
+          noexcept(
+            conditional<true, T, P>::type::query(BOOST_ASIO_MOVE_CAST(P)(p))
+          )
+        )
+        -> decltype(
+          conditional<true, T, P>::type::query(BOOST_ASIO_MOVE_CAST(P)(p))
+        )
+      {
+        return T::query(BOOST_ASIO_MOVE_CAST(P)(p));
+      }
+    };
+#else // defined(BOOST_ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT)
+    typedef T type;
+#endif // defined(BOOST_ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT)
+  };
+
+  template <typename T>
+  struct query_static_constexpr_member :
+    traits::query_static_constexpr_member<
+      typename static_proxy<T>::type, context_t> {};
+
+#if defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
+  && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
+  template <typename T>
+  static BOOST_ASIO_CONSTEXPR
+  typename query_static_constexpr_member<T>::result_type
+  static_query()
+    BOOST_ASIO_NOEXCEPT_IF((
+      query_static_constexpr_member<T>::is_noexcept))
+  {
+    return query_static_constexpr_member<T>::value();
+  }
+
+  template <typename E, typename T = decltype(context_t::static_query<E>())>
+  static BOOST_ASIO_CONSTEXPR const T static_query_v
+    = context_t::static_query<E>();
+#endif // defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
+       //   && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
+
+#if !defined(BOOST_ASIO_HAS_CONSTEXPR)
+  static const context_t instance;
+#endif // !defined(BOOST_ASIO_HAS_CONSTEXPR)
+};
+
+#if defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
+  && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
+template <int I> template <typename E, typename T>
+const T context_t<I>::static_query_v;
+#endif // defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
+       //   && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
+
+#if !defined(BOOST_ASIO_HAS_CONSTEXPR)
+template <int I>
+const context_t<I> context_t<I>::instance;
+#endif
+
+} // namespace detail
+
+typedef detail::context_t<> context_t;
+
+#if defined(BOOST_ASIO_HAS_CONSTEXPR) || defined(GENERATING_DOCUMENTATION)
+constexpr context_t context;
+#else // defined(BOOST_ASIO_HAS_CONSTEXPR) || defined(GENERATING_DOCUMENTATION)
+namespace { static const context_t& context = context_t::instance; }
+#endif
+
+} // namespace execution
+
+#if !defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)
+
+template <typename T>
+struct is_applicable_property<T, execution::context_t>
+  : integral_constant<bool,
+      execution::is_executor<T>::value
+#if !defined(BOOST_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(BOOST_ASIO_NO_DEPRECATED)
+    >
+{
+};
+
+#endif // !defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)
+
+namespace traits {
+
+#if !defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
+  || !defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
+
+template <typename T>
+struct static_query<T, execution::context_t,
+  typename enable_if<
+    execution::detail::context_t<0>::
+      query_static_constexpr_member<T>::is_valid
+  >::type>
+{
+  BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+  BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
+
+  typedef typename execution::detail::context_t<0>::
+    query_static_constexpr_member<T>::result_type result_type;
+
+  static BOOST_ASIO_CONSTEXPR result_type value()
+  {
+    return execution::detail::context_t<0>::
+      query_static_constexpr_member<T>::value();
+  }
+};
+
+#endif // !defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
+       //   || !defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
+
+} // namespace traits
+
+#endif // defined(GENERATING_DOCUMENTATION)
+
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // BOOST_ASIO_EXECUTION_CONTEXT2_HPP