//
|
// traits/schedule_member.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_TRAITS_SCHEDULE_MEMBER_HPP
|
#define BOOST_ASIO_TRAITS_SCHEDULE_MEMBER_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>
|
|
#if defined(BOOST_ASIO_HAS_DECLTYPE) \
|
&& defined(BOOST_ASIO_HAS_NOEXCEPT) \
|
&& defined(BOOST_ASIO_HAS_WORKING_EXPRESSION_SFINAE)
|
# define BOOST_ASIO_HAS_DEDUCED_SCHEDULE_MEMBER_TRAIT 1
|
#endif // defined(BOOST_ASIO_HAS_DECLTYPE)
|
// && defined(BOOST_ASIO_HAS_NOEXCEPT)
|
// && defined(BOOST_ASIO_HAS_WORKING_EXPRESSION_SFINAE)
|
|
#include <boost/asio/detail/push_options.hpp>
|
|
namespace boost {
|
namespace asio {
|
namespace traits {
|
|
template <typename T, typename = void>
|
struct schedule_member_default;
|
|
template <typename T, typename = void>
|
struct schedule_member;
|
|
} // namespace traits
|
namespace detail {
|
|
struct no_schedule_member
|
{
|
BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = false);
|
BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false);
|
};
|
|
#if defined(BOOST_ASIO_HAS_DEDUCED_SCHEDULE_MEMBER_TRAIT)
|
|
template <typename T, typename = void>
|
struct schedule_member_trait : no_schedule_member
|
{
|
};
|
|
template <typename T>
|
struct schedule_member_trait<T,
|
typename void_type<
|
decltype(declval<T>().schedule())
|
>::type>
|
{
|
BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
|
|
using result_type = decltype(declval<T>().schedule());
|
|
BOOST_ASIO_STATIC_CONSTEXPR(bool,
|
is_noexcept = noexcept(declval<T>().schedule()));
|
};
|
|
#else // defined(BOOST_ASIO_HAS_DEDUCED_SCHEDULE_MEMBER_TRAIT)
|
|
template <typename T, typename = void>
|
struct schedule_member_trait :
|
conditional<
|
is_same<T, typename remove_reference<T>::type>::value,
|
typename conditional<
|
is_same<T, typename add_const<T>::type>::value,
|
no_schedule_member,
|
traits::schedule_member<typename add_const<T>::type>
|
>::type,
|
traits::schedule_member<typename remove_reference<T>::type>
|
>::type
|
{
|
};
|
|
#endif // defined(BOOST_ASIO_HAS_DEDUCED_SCHEDULE_MEMBER_TRAIT)
|
|
} // namespace detail
|
namespace traits {
|
|
template <typename T, typename>
|
struct schedule_member_default :
|
detail::schedule_member_trait<T>
|
{
|
};
|
|
template <typename T, typename>
|
struct schedule_member :
|
schedule_member_default<T>
|
{
|
};
|
|
} // namespace traits
|
} // namespace asio
|
} // namespace boost
|
|
#include <boost/asio/detail/pop_options.hpp>
|
|
#endif // BOOST_ASIO_TRAITS_SCHEDULE_MEMBER_HPP
|
