FM / execution

/usr/include/boost/asio/execution

Name	Size	Mode	Actions
detail/	-	0755	rm
impl/	-	0755	rm
allocator.hpp	7823	0644	edit dl rm
any_executor.hpp	70761	0644	edit dl rm
bad_executor.hpp	1310	0644	edit dl rm
blocking.hpp	41336	0644	edit dl rm
blocking_adaptation.hpp	33522	0644	edit dl rm
bulk_execute.hpp	12972	0644	edit dl rm
bulk_guarantee.hpp	32421	0644	edit dl rm
connect.hpp	14688	0644	edit dl rm
context.hpp	5574	0644	edit dl rm
context_as.hpp	6328	0644	edit dl rm
execute.hpp	7579	0644	edit dl rm
executor.hpp	7069	0644	edit dl rm
invocable_archetype.hpp	2037	0644	edit dl rm
mapping.hpp	28989	0644	edit dl rm
occupancy.hpp	5501	0644	edit dl rm
operation_state.hpp	2750	0644	edit dl rm
outstanding_work.hpp	23123	0644	edit dl rm
prefer_only.hpp	9569	0644	edit dl rm
receiver.hpp	9669	0644	edit dl rm
receiver_invocation_error.hpp	1415	0644	edit dl rm
relationship.hpp	22518	0644	edit dl rm
schedule.hpp	7545	0644	edit dl rm
scheduler.hpp	2374	0644	edit dl rm
sender.hpp	8539	0644	edit dl rm
set_done.hpp	6640	0644	edit dl rm
set_error.hpp	7367	0644	edit dl rm
set_value.hpp	15285	0644	edit dl rm
start.hpp	6218	0644	edit dl rm
submit.hpp	13478	0644	edit dl rm

Edit: /usr/include/boost/asio/execution/relationship.hpp (22518B)

#ifndef BOOST_ASIO_EXECUTION_RELATIONSHIP_HPP
#define BOOST_ASIO_EXECUTION_RELATIONSHIP_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/query.hpp>
#include <boost/asio/traits/query_free.hpp>
#include <boost/asio/traits/query_member.hpp>
#include <boost/asio/traits/query_static_constexpr_member.hpp>
#include <boost/asio/traits/static_query.hpp>
#include <boost/asio/traits/static_require.hpp>

#include <boost/asio/detail/push_options.hpp>

namespace boost {
namespace asio {

#if defined(GENERATING_DOCUMENTATION)

namespace execution {

/// A property to describe whether submitted tasks represent continuations of
/// the calling context.
struct relationship_t
{
 /// The relationship_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 relationship_t property cannot be required.
  static constexpr bool is_requirable = false;

/// The top-level relationship_t property cannot be preferred.
  static constexpr bool is_preferable = false;

/// The type returned by queries against an @c any_executor.
  typedef relationship_t polymorphic_query_result_type;

/// A sub-property that indicates that the executor does not represent a
 /// continuation of the calling context.
 struct fork_t
 {
 /// The relationship_t::fork_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 relationship_t::fork_t property can be required.
    static constexpr bool is_requirable = true;

/// The relationship_t::fork_t property can be preferred.
    static constexpr bool is_preferable = true;

/// The type returned by queries against an @c any_executor.
    typedef relationship_t polymorphic_query_result_type;

/// Default constructor.
    constexpr fork_t();

/// Get the value associated with a property object.
    /**
     * @returns fork_t();
     */
    static constexpr relationship_t value();
  };

/// A sub-property that indicates that the executor represents a continuation
 /// of the calling context.
 struct continuation_t
 {
 /// The relationship_t::continuation_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 relationship_t::continuation_t property can be required.
    static constexpr bool is_requirable = true;

/// The relationship_t::continuation_t property can be preferred.
    static constexpr bool is_preferable = true;

/// The type returned by queries against an @c any_executor.
    typedef relationship_t polymorphic_query_result_type;

/// Default constructor.
    constexpr continuation_t();

/// Get the value associated with a property object.
    /**
     * @returns continuation_t();
     */
    static constexpr relationship_t value();
  };

/// A special value used for accessing the relationship_t::fork_t property.
  static constexpr fork_t fork;

/// A special value used for accessing the relationship_t::continuation_t
  /// property.
  static constexpr continuation_t continuation;

/// Default constructor.
  constexpr relationship_t();

/// Construct from a sub-property value.
  constexpr relationship_t(fork_t);

/// Construct from a sub-property value.
  constexpr relationship_t(continuation_t);

/// Compare property values for equality.
  friend constexpr bool operator==(
      const relationship_t& a, const relationship_t& b) noexcept;

/// Compare property values for inequality.
  friend constexpr bool operator!=(
      const relationship_t& a, const relationship_t& b) noexcept;
};

/// A special value used for accessing the relationship_t property.
constexpr relationship_t relationship;

} // namespace execution

#else // defined(GENERATING_DOCUMENTATION)

namespace execution {
namespace detail {
namespace relationship {

template <int I> struct fork_t;
template <int I> struct continuation_t;

} // namespace relationship

template <int I = 0>
struct relationship_t
{
#if defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)
 template <typename T>
 BOOST_ASIO_STATIC_CONSTEXPR(bool,
 is_applicable_property_v = is_executor<T>::value
 || is_sender<T>::value || is_scheduler<T>::value);
#endif // defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)

BOOST_ASIO_STATIC_CONSTEXPR(bool, is_requirable = false);
  BOOST_ASIO_STATIC_CONSTEXPR(bool, is_preferable = false);
  typedef relationship_t polymorphic_query_result_type;

typedef detail::relationship::fork_t fork_t;
 typedef detail::relationship::continuation_t continuation_t;

BOOST_ASIO_CONSTEXPR relationship_t()
    : value_(-1)
  {
  }

BOOST_ASIO_CONSTEXPR relationship_t(fork_t)
    : value_(0)
  {
  }

BOOST_ASIO_CONSTEXPR relationship_t(continuation_t)
    : value_(1)
  {
  }

#if defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
 && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
 template <typename T>
 static BOOST_ASIO_CONSTEXPR
 typename traits::query_static_constexpr_member<
 T, relationship_t>::result_type
 static_query()
 BOOST_ASIO_NOEXCEPT_IF((
 traits::query_static_constexpr_member<
 T, relationship_t
 >::is_noexcept))
 {
 return traits::query_static_constexpr_member<
 T, relationship_t>::value();
 }

template <typename T>
 static BOOST_ASIO_CONSTEXPR
 typename traits::static_query<T, fork_t>::result_type
 static_query(
 typename enable_if<
 !traits::query_static_constexpr_member<
 T, relationship_t>::is_valid
 && !traits::query_member<T, relationship_t>::is_valid
 && traits::static_query<T, fork_t>::is_valid
 >::type* = 0) BOOST_ASIO_NOEXCEPT
 {
 return traits::static_query<T, fork_t>::value();
 }

template <typename T>
 static BOOST_ASIO_CONSTEXPR
 typename traits::static_query<T, continuation_t>::result_type
 static_query(
 typename enable_if<
 !traits::query_static_constexpr_member<
 T, relationship_t>::is_valid
 && !traits::query_member<T, relationship_t>::is_valid
 && !traits::static_query<T, fork_t>::is_valid
 && traits::static_query<T, continuation_t>::is_valid
 >::type* = 0) BOOST_ASIO_NOEXCEPT
 {
 return traits::static_query<T, continuation_t>::value();
 }

template <typename E,
 typename T = decltype(relationship_t::static_query<E>())>
 static BOOST_ASIO_CONSTEXPR const T static_query_v
 = relationship_t::static_query<E>();
#endif // defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
 // && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)

friend BOOST_ASIO_CONSTEXPR bool operator==(
      const relationship_t& a, const relationship_t& b)
  {
    return a.value_ == b.value_;
  }

friend BOOST_ASIO_CONSTEXPR bool operator!=(
      const relationship_t& a, const relationship_t& b)
  {
    return a.value_ != b.value_;
  }

struct convertible_from_relationship_t
  {
    BOOST_ASIO_CONSTEXPR convertible_from_relationship_t(relationship_t)
    {
    }
  };

template <typename Executor>
 friend BOOST_ASIO_CONSTEXPR relationship_t query(
 const Executor& ex, convertible_from_relationship_t,
 typename enable_if<
 can_query<const Executor&, fork_t>::value
 >::type* = 0)
#if !defined(__clang__) // Clang crashes if noexcept is used here.
#if defined(BOOST_ASIO_MSVC) // Visual C++ wants the type to be qualified.
 BOOST_ASIO_NOEXCEPT_IF((
 is_nothrow_query<const Executor&, relationship_t<>::fork_t>::value))
#else // defined(BOOST_ASIO_MSVC)
 BOOST_ASIO_NOEXCEPT_IF((
 is_nothrow_query<const Executor&, fork_t>::value))
#endif // defined(BOOST_ASIO_MSVC)
#endif // !defined(__clang__)
 {
 return boost::asio::query(ex, fork_t());
 }

template <typename Executor>
 friend BOOST_ASIO_CONSTEXPR relationship_t query(
 const Executor& ex, convertible_from_relationship_t,
 typename enable_if<
 !can_query<const Executor&, fork_t>::value
 && can_query<const Executor&, continuation_t>::value
 >::type* = 0)
#if !defined(__clang__) // Clang crashes if noexcept is used here.
#if defined(BOOST_ASIO_MSVC) // Visual C++ wants the type to be qualified.
 BOOST_ASIO_NOEXCEPT_IF((
 is_nothrow_query<const Executor&,
 relationship_t<>::continuation_t>::value))
#else // defined(BOOST_ASIO_MSVC)
 BOOST_ASIO_NOEXCEPT_IF((
 is_nothrow_query<const Executor&, continuation_t>::value))
#endif // defined(BOOST_ASIO_MSVC)
#endif // !defined(__clang__)
 {
 return boost::asio::query(ex, continuation_t());
 }

BOOST_ASIO_STATIC_CONSTEXPR_DEFAULT_INIT(fork_t, fork);
  BOOST_ASIO_STATIC_CONSTEXPR_DEFAULT_INIT(continuation_t, continuation);

#if !defined(BOOST_ASIO_HAS_CONSTEXPR)
  static const relationship_t instance;
#endif // !defined(BOOST_ASIO_HAS_CONSTEXPR)

private:
  int value_;
};

#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 relationship_t::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 relationship_t relationship_t::instance;
#endif

template <int I>
const typename relationship_t::fork_t
relationship_t::fork;

template <int I>
const typename relationship_t::continuation_t
relationship_t::continuation;

namespace relationship {

template <int I = 0>
struct fork_t
{
#if defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)
 template <typename T>
 BOOST_ASIO_STATIC_CONSTEXPR(bool,
 is_applicable_property_v = is_executor<T>::value
 || is_sender<T>::value || is_scheduler<T>::value);
#endif // defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)

BOOST_ASIO_STATIC_CONSTEXPR(bool, is_requirable = true);
 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_preferable = true);
 typedef relationship_t polymorphic_query_result_type;

BOOST_ASIO_CONSTEXPR fork_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 traits::query_static_constexpr_member<T, fork_t>::result_type
 static_query()
 BOOST_ASIO_NOEXCEPT_IF((
 traits::query_static_constexpr_member<T, fork_t>::is_noexcept))
 {
 return traits::query_static_constexpr_member<T, fork_t>::value();
 }

template <typename T>
 static BOOST_ASIO_CONSTEXPR fork_t static_query(
 typename enable_if<
 !traits::query_static_constexpr_member<T, fork_t>::is_valid
 && !traits::query_member<T, fork_t>::is_valid
 && !traits::query_free<T, fork_t>::is_valid
 && !can_query<T, continuation_t >::value
 >::type* = 0) BOOST_ASIO_NOEXCEPT
 {
 return fork_t();
 }

template <typename E, typename T = decltype(fork_t::static_query<E>())>
 static BOOST_ASIO_CONSTEXPR const T static_query_v
 = fork_t::static_query<E>();
#endif // defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
 // && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)

static BOOST_ASIO_CONSTEXPR relationship_t value()
 {
 return fork_t();
 }

friend BOOST_ASIO_CONSTEXPR bool operator==(
      const fork_t&, const fork_t&)
  {
    return true;
  }

friend BOOST_ASIO_CONSTEXPR bool operator!=(
      const fork_t&, const fork_t&)
  {
    return false;
  }
};

#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 fork_t::static_query_v;
#endif // defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
 // && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)

template <int I = 0>
struct continuation_t
{
#if defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)
 template <typename T>
 BOOST_ASIO_STATIC_CONSTEXPR(bool,
 is_applicable_property_v = is_executor<T>::value
 || is_sender<T>::value || is_scheduler<T>::value);
#endif // defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)

BOOST_ASIO_STATIC_CONSTEXPR(bool, is_requirable = true);
 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_preferable = true);
 typedef relationship_t polymorphic_query_result_type;

BOOST_ASIO_CONSTEXPR continuation_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 traits::query_static_constexpr_member<T, continuation_t>::result_type
 static_query()
 BOOST_ASIO_NOEXCEPT_IF((
 traits::query_static_constexpr_member<T, continuation_t>::is_noexcept))
 {
 return traits::query_static_constexpr_member<T, continuation_t>::value();
 }

template <typename E,
 typename T = decltype(continuation_t::static_query<E>())>
 static BOOST_ASIO_CONSTEXPR const T static_query_v
 = continuation_t::static_query<E>();
#endif // defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
 // && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)

static BOOST_ASIO_CONSTEXPR relationship_t value()
 {
 return continuation_t();
 }

friend BOOST_ASIO_CONSTEXPR bool operator==(
      const continuation_t&, const continuation_t&)
  {
    return true;
  }

friend BOOST_ASIO_CONSTEXPR bool operator!=(
      const continuation_t&, const continuation_t&)
  {
    return false;
  }
};

#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 continuation_t::static_query_v;
#endif // defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
 // && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)

} // namespace relationship
} // namespace detail

typedef detail::relationship_t<> relationship_t;

#if defined(BOOST_ASIO_HAS_CONSTEXPR) || defined(GENERATING_DOCUMENTATION)
constexpr relationship_t relationship;
#else // defined(BOOST_ASIO_HAS_CONSTEXPR) || defined(GENERATING_DOCUMENTATION)
namespace { static const relationship_t&
  relationship = relationship_t::instance; }
#endif

} // namespace execution

#if !defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)

template <typename T>
struct is_applicable_property<T, execution::relationship_t>
 : integral_constant<bool,
 execution::is_executor<T>::value
 || execution::is_sender<T>::value
 || execution::is_scheduler<T>::value>
{
};

template <typename T>
struct is_applicable_property<T, execution::relationship_t::fork_t>
 : integral_constant<bool,
 execution::is_executor<T>::value
 || execution::is_sender<T>::value
 || execution::is_scheduler<T>::value>
{
};

template <typename T>
struct is_applicable_property<T, execution::relationship_t::continuation_t>
 : integral_constant<bool,
 execution::is_executor<T>::value
 || execution::is_sender<T>::value
 || execution::is_scheduler<T>::value>
{
};

#endif // !defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)

namespace traits {

#if !defined(BOOST_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>
{
 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
 BOOST_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>
{
 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept =
 (is_nothrow_query<T, execution::relationship_t::continuation_t>::value));

typedef execution::relationship_t result_type;
};

#endif // !defined(BOOST_ASIO_HAS_DEDUCED_QUERY_FREE_TRAIT)

#if !defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
  || !defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)

template <typename T>
struct static_query<T, execution::relationship_t,
 typename enable_if<
 traits::query_static_constexpr_member<T,
 execution::relationship_t>::is_valid
 >::type>
{
 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);

typedef typename traits::query_static_constexpr_member<T,
 execution::relationship_t>::result_type result_type;

static BOOST_ASIO_CONSTEXPR result_type value()
 {
 return traits::query_static_constexpr_member<T,
 execution::relationship_t>::value();
 }
};

template <typename T>
struct static_query<T, execution::relationship_t,
 typename enable_if<
 !traits::query_static_constexpr_member<T,
 execution::relationship_t>::is_valid
 && !traits::query_member<T,
 execution::relationship_t>::is_valid
 && traits::static_query<T,
 execution::relationship_t::fork_t>::is_valid
 >::type>
{
 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);

typedef typename traits::static_query<T,
 execution::relationship_t::fork_t>::result_type result_type;

static BOOST_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<
 !traits::query_static_constexpr_member<T,
 execution::relationship_t>::is_valid
 && !traits::query_member<T,
 execution::relationship_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>
{
 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);

typedef typename traits::static_query<T,
 execution::relationship_t::continuation_t>::result_type result_type;

static BOOST_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<
 traits::query_static_constexpr_member<T,
 execution::relationship_t::fork_t>::is_valid
 >::type>
{
 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);

typedef typename traits::query_static_constexpr_member<T,
 execution::relationship_t::fork_t>::result_type result_type;

static BOOST_ASIO_CONSTEXPR result_type value()
 {
 return traits::query_static_constexpr_member<T,
 execution::relationship_t::fork_t>::value();
 }
};

template <typename T>
struct static_query<T, execution::relationship_t::fork_t,
 typename enable_if<
 !traits::query_static_constexpr_member<T,
 execution::relationship_t::fork_t>::is_valid
 && !traits::query_member<T,
 execution::relationship_t::fork_t>::is_valid
 && !traits::query_free<T,
 execution::relationship_t::fork_t>::is_valid
 && !can_query<T, execution::relationship_t::continuation_t>::value
 >::type>
{
 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);

typedef execution::relationship_t::fork_t result_type;

static BOOST_ASIO_CONSTEXPR result_type value()
  {
    return result_type();
  }
};

template <typename T>
struct static_query<T, execution::relationship_t::continuation_t,
 typename enable_if<
 traits::query_static_constexpr_member<T,
 execution::relationship_t::continuation_t>::is_valid
 >::type>
{
 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);

typedef typename traits::query_static_constexpr_member<T,
 execution::relationship_t::continuation_t>::result_type result_type;

static BOOST_ASIO_CONSTEXPR result_type value()
 {
 return traits::query_static_constexpr_member<T,
 execution::relationship_t::continuation_t>::value();
 }
};

#endif // !defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
       //   || !defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)

#if !defined(BOOST_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>
{
 BOOST_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>
{
 BOOST_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(BOOST_ASIO_HAS_DEDUCED_STATIC_REQUIRE_TRAIT)

} // namespace traits

#endif // defined(GENERATING_DOCUMENTATION)

} // namespace asio
} // namespace boost

#include <boost/asio/detail/pop_options.hpp>

#endif // BOOST_ASIO_EXECUTION_RELATIONSHIP_HPP

// // execution/relationship.hpp // ~~~~~~~~~~~~~~~~~~~~~~~~~~ // // Copyright (c) 2003-2020 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_RELATIONSHIP_HPP #define BOOST_ASIO_EXECUTION_RELATIONSHIP_HPP #if defined(_MSC_VER) && (_MSC_VER >= 1200) # pragma once #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) #include #include #include #include #include #include #include #include #include #include #include #include #include namespace boost { namespace asio { #if defined(GENERATING_DOCUMENTATION) namespace execution { /// A property to describe whether submitted tasks represent continuations of /// the calling context. struct relationship_t { /// The relationship_t property applies to executors, senders, and schedulers. template static constexpr bool is_applicable_property_v = is_executor_v || is_sender_v || is_scheduler_v; /// The top-level relationship_t property cannot be required. static constexpr bool is_requirable = false; /// The top-level relationship_t property cannot be preferred. static constexpr bool is_preferable = false; /// The type returned by queries against an @c any_executor. typedef relationship_t polymorphic_query_result_type; /// A sub-property that indicates that the executor does not represent a /// continuation of the calling context. struct fork_t { /// The relationship_t::fork_t property applies to executors, senders, and /// schedulers. template static constexpr bool is_applicable_property_v = is_executor_v || is_sender_v || is_scheduler_v; /// The relationship_t::fork_t property can be required. static constexpr bool is_requirable = true; /// The relationship_t::fork_t property can be preferred. static constexpr bool is_preferable = true; /// The type returned by queries against an @c any_executor. typedef relationship_t polymorphic_query_result_type; /// Default constructor. constexpr fork_t(); /// Get the value associated with a property object. /** * @returns fork_t(); */ static constexpr relationship_t value(); }; /// A sub-property that indicates that the executor represents a continuation /// of the calling context. struct continuation_t { /// The relationship_t::continuation_t property applies to executors, /// senders, and schedulers. template static constexpr bool is_applicable_property_v = is_executor_v || is_sender_v || is_scheduler_v; /// The relationship_t::continuation_t property can be required. static constexpr bool is_requirable = true; /// The relationship_t::continuation_t property can be preferred. static constexpr bool is_preferable = true; /// The type returned by queries against an @c any_executor. typedef relationship_t polymorphic_query_result_type; /// Default constructor. constexpr continuation_t(); /// Get the value associated with a property object. /** * @returns continuation_t(); */ static constexpr relationship_t value(); }; /// A special value used for accessing the relationship_t::fork_t property. static constexpr fork_t fork; /// A special value used for accessing the relationship_t::continuation_t /// property. static constexpr continuation_t continuation; /// Default constructor. constexpr relationship_t(); /// Construct from a sub-property value. constexpr relationship_t(fork_t); /// Construct from a sub-property value. constexpr relationship_t(continuation_t); /// Compare property values for equality. friend constexpr bool operator==( const relationship_t& a, const relationship_t& b) noexcept; /// Compare property values for inequality. friend constexpr bool operator!=( const relationship_t& a, const relationship_t& b) noexcept; }; /// A special value used for accessing the relationship_t property. constexpr relationship_t relationship; } // namespace execution #else // defined(GENERATING_DOCUMENTATION) namespace execution { namespace detail { namespace relationship { template struct fork_t; template struct continuation_t; } // namespace relationship template struct relationship_t { #if defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES) template BOOST_ASIO_STATIC_CONSTEXPR(bool, is_applicable_property_v = is_executor::value || is_sender::value || is_scheduler::value); #endif // defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES) BOOST_ASIO_STATIC_CONSTEXPR(bool, is_requirable = false); BOOST_ASIO_STATIC_CONSTEXPR(bool, is_preferable = false); typedef relationship_t polymorphic_query_result_type; typedef detail::relationship::fork_t fork_t; typedef detail::relationship::continuation_t continuation_t; BOOST_ASIO_CONSTEXPR relationship_t() : value_(-1) { } BOOST_ASIO_CONSTEXPR relationship_t(fork_t) : value_(0) { } BOOST_ASIO_CONSTEXPR relationship_t(continuation_t) : value_(1) { } #if defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \ && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) template static BOOST_ASIO_CONSTEXPR typename traits::query_static_constexpr_member< T, relationship_t>::result_type static_query() BOOST_ASIO_NOEXCEPT_IF(( traits::query_static_constexpr_member< T, relationship_t >::is_noexcept)) { return traits::query_static_constexpr_member< T, relationship_t>::value(); } template static BOOST_ASIO_CONSTEXPR typename traits::static_query::result_type static_query( typename enable_if< !traits::query_static_constexpr_member< T, relationship_t>::is_valid && !traits::query_member::is_valid && traits::static_query::is_valid >::type* = 0) BOOST_ASIO_NOEXCEPT { return traits::static_query::value(); } template static BOOST_ASIO_CONSTEXPR typename traits::static_query::result_type static_query( typename enable_if< !traits::query_static_constexpr_member< T, relationship_t>::is_valid && !traits::query_member::is_valid && !traits::static_query::is_valid && traits::static_query::is_valid >::type* = 0) BOOST_ASIO_NOEXCEPT { return traits::static_query::value(); } template ())> static BOOST_ASIO_CONSTEXPR const T static_query_v = relationship_t::static_query(); #endif // defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) // && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) friend BOOST_ASIO_CONSTEXPR bool operator==( const relationship_t& a, const relationship_t& b) { return a.value_ == b.value_; } friend BOOST_ASIO_CONSTEXPR bool operator!=( const relationship_t& a, const relationship_t& b) { return a.value_ != b.value_; } struct convertible_from_relationship_t { BOOST_ASIO_CONSTEXPR convertible_from_relationship_t(relationship_t) { } }; template friend BOOST_ASIO_CONSTEXPR relationship_t query( const Executor& ex, convertible_from_relationship_t, typename enable_if< can_query::value >::type* = 0) #if !defined(__clang__) // Clang crashes if noexcept is used here. #if defined(BOOST_ASIO_MSVC) // Visual C++ wants the type to be qualified. BOOST_ASIO_NOEXCEPT_IF(( is_nothrow_query::fork_t>::value)) #else // defined(BOOST_ASIO_MSVC) BOOST_ASIO_NOEXCEPT_IF(( is_nothrow_query::value)) #endif // defined(BOOST_ASIO_MSVC) #endif // !defined(__clang__) { return boost::asio::query(ex, fork_t()); } template friend BOOST_ASIO_CONSTEXPR relationship_t query( const Executor& ex, convertible_from_relationship_t, typename enable_if< !can_query::value && can_query::value >::type* = 0) #if !defined(__clang__) // Clang crashes if noexcept is used here. #if defined(BOOST_ASIO_MSVC) // Visual C++ wants the type to be qualified. BOOST_ASIO_NOEXCEPT_IF(( is_nothrow_query::continuation_t>::value)) #else // defined(BOOST_ASIO_MSVC) BOOST_ASIO_NOEXCEPT_IF(( is_nothrow_query::value)) #endif // defined(BOOST_ASIO_MSVC) #endif // !defined(__clang__) { return boost::asio::query(ex, continuation_t()); } BOOST_ASIO_STATIC_CONSTEXPR_DEFAULT_INIT(fork_t, fork); BOOST_ASIO_STATIC_CONSTEXPR_DEFAULT_INIT(continuation_t, continuation); #if !defined(BOOST_ASIO_HAS_CONSTEXPR) static const relationship_t instance; #endif // !defined(BOOST_ASIO_HAS_CONSTEXPR) private: int value_; }; #if defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \ && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) template template const T relationship_t::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 const relationship_t relationship_t::instance; #endif template const typename relationship_t::fork_t relationship_t::fork; template const typename relationship_t::continuation_t relationship_t::continuation; namespace relationship { template struct fork_t { #if defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES) template BOOST_ASIO_STATIC_CONSTEXPR(bool, is_applicable_property_v = is_executor::value || is_sender::value || is_scheduler::value); #endif // defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES) BOOST_ASIO_STATIC_CONSTEXPR(bool, is_requirable = true); BOOST_ASIO_STATIC_CONSTEXPR(bool, is_preferable = true); typedef relationship_t polymorphic_query_result_type; BOOST_ASIO_CONSTEXPR fork_t() { } #if defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \ && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) template static BOOST_ASIO_CONSTEXPR typename traits::query_static_constexpr_member::result_type static_query() BOOST_ASIO_NOEXCEPT_IF(( traits::query_static_constexpr_member::is_noexcept)) { return traits::query_static_constexpr_member::value(); } template static BOOST_ASIO_CONSTEXPR fork_t static_query( typename enable_if< !traits::query_static_constexpr_member::is_valid && !traits::query_member::is_valid && !traits::query_free::is_valid && !can_query >::value >::type* = 0) BOOST_ASIO_NOEXCEPT { return fork_t(); } template ())> static BOOST_ASIO_CONSTEXPR const T static_query_v = fork_t::static_query(); #endif // defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) // && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) static BOOST_ASIO_CONSTEXPR relationship_t value() { return fork_t(); } friend BOOST_ASIO_CONSTEXPR bool operator==( const fork_t&, const fork_t&) { return true; } friend BOOST_ASIO_CONSTEXPR bool operator!=( const fork_t&, const fork_t&) { return false; } }; #if defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \ && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) template template const T fork_t::static_query_v; #endif // defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) // && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) template struct continuation_t { #if defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES) template BOOST_ASIO_STATIC_CONSTEXPR(bool, is_applicable_property_v = is_executor::value || is_sender::value || is_scheduler::value); #endif // defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES) BOOST_ASIO_STATIC_CONSTEXPR(bool, is_requirable = true); BOOST_ASIO_STATIC_CONSTEXPR(bool, is_preferable = true); typedef relationship_t polymorphic_query_result_type; BOOST_ASIO_CONSTEXPR continuation_t() { } #if defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \ && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) template static BOOST_ASIO_CONSTEXPR typename traits::query_static_constexpr_member::result_type static_query() BOOST_ASIO_NOEXCEPT_IF(( traits::query_static_constexpr_member::is_noexcept)) { return traits::query_static_constexpr_member::value(); } template ())> static BOOST_ASIO_CONSTEXPR const T static_query_v = continuation_t::static_query(); #endif // defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) // && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) static BOOST_ASIO_CONSTEXPR relationship_t value() { return continuation_t(); } friend BOOST_ASIO_CONSTEXPR bool operator==( const continuation_t&, const continuation_t&) { return true; } friend BOOST_ASIO_CONSTEXPR bool operator!=( const continuation_t&, const continuation_t&) { return false; } }; #if defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \ && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) template template const T continuation_t::static_query_v; #endif // defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) // && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) } // namespace relationship } // namespace detail typedef detail::relationship_t<> relationship_t; #if defined(BOOST_ASIO_HAS_CONSTEXPR) || defined(GENERATING_DOCUMENTATION) constexpr relationship_t relationship; #else // defined(BOOST_ASIO_HAS_CONSTEXPR) || defined(GENERATING_DOCUMENTATION) namespace { static const relationship_t& relationship = relationship_t::instance; } #endif } // namespace execution #if !defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES) template struct is_applicable_property : integral_constant::value || execution::is_sender::value || execution::is_scheduler::value> { }; template struct is_applicable_property : integral_constant::value || execution::is_sender::value || execution::is_scheduler::value> { }; template struct is_applicable_property : integral_constant::value || execution::is_sender::value || execution::is_scheduler::value> { }; #endif // !defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES) namespace traits { #if !defined(BOOST_ASIO_HAS_DEDUCED_QUERY_FREE_TRAIT) template struct query_free_default::value >::type> { BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true); BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = (is_nothrow_query::value)); typedef execution::relationship_t result_type; }; template struct query_free_default::value && can_query::value >::type> { BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true); BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = (is_nothrow_query::value)); typedef execution::relationship_t result_type; }; #endif // !defined(BOOST_ASIO_HAS_DEDUCED_QUERY_FREE_TRAIT) #if !defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \ || !defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) template struct static_query::is_valid >::type> { BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true); BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true); typedef typename traits::query_static_constexpr_member::result_type result_type; static BOOST_ASIO_CONSTEXPR result_type value() { return traits::query_static_constexpr_member::value(); } }; template struct static_query::is_valid && !traits::query_member::is_valid && traits::static_query::is_valid >::type> { BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true); BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true); typedef typename traits::static_query::result_type result_type; static BOOST_ASIO_CONSTEXPR result_type value() { return traits::static_query::value(); } }; template struct static_query::is_valid && !traits::query_member::is_valid && !traits::static_query::is_valid && traits::static_query::is_valid >::type> { BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true); BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true); typedef typename traits::static_query::result_type result_type; static BOOST_ASIO_CONSTEXPR result_type value() { return traits::static_query::value(); } }; template struct static_query::is_valid >::type> { BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true); BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true); typedef typename traits::query_static_constexpr_member::result_type result_type; static BOOST_ASIO_CONSTEXPR result_type value() { return traits::query_static_constexpr_member::value(); } }; template struct static_query::is_valid && !traits::query_member::is_valid && !traits::query_free::is_valid && !can_query::value >::type> { BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true); BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true); typedef execution::relationship_t::fork_t result_type; static BOOST_ASIO_CONSTEXPR result_type value() { return result_type(); } }; template struct static_query::is_valid >::type> { BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true); BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true); typedef typename traits::query_static_constexpr_member::result_type result_type; static BOOST_ASIO_CONSTEXPR result_type value() { return traits::query_static_constexpr_member::value(); } }; #endif // !defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) // || !defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES) #if !defined(BOOST_ASIO_HAS_DEDUCED_STATIC_REQUIRE_TRAIT) template struct static_require::is_valid >::type> { BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = (is_same::result_type, execution::relationship_t::fork_t>::value)); }; template struct static_require::is_valid >::type> { BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = (is_same::result_type, execution::relationship_t::continuation_t>::value)); }; #endif // !defined(BOOST_ASIO_HAS_DEDUCED_STATIC_REQUIRE_TRAIT) } // namespace traits #endif // defined(GENERATING_DOCUMENTATION) } // namespace asio } // namespace boost #include #endif // BOOST_ASIO_EXECUTION_RELATIONSHIP_HPP