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- //
- // traits/set_value_member.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 BOOST_ASIO_TRAITS_SET_VALUE_MEMBER_HPP
- #define BOOST_ASIO_TRAITS_SET_VALUE_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>
- #include <boost/asio/detail/variadic_templates.hpp>
- #if defined(BOOST_ASIO_HAS_DECLTYPE) \
- && defined(BOOST_ASIO_HAS_NOEXCEPT) \
- && defined(BOOST_ASIO_HAS_WORKING_EXPRESSION_SFINAE)
- # define BOOST_ASIO_HAS_DEDUCED_SET_VALUE_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 Vs, typename = void>
- struct set_value_member_default;
- template <typename T, typename Vs, typename = void>
- struct set_value_member;
- } // namespace traits
- namespace detail {
- struct no_set_value_member
- {
- BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = false);
- BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false);
- };
- #if defined(BOOST_ASIO_HAS_DEDUCED_SET_VALUE_MEMBER_TRAIT)
- template <typename T, typename Vs, typename = void>
- struct set_value_member_trait : no_set_value_member
- {
- };
- #if defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
- template <typename T, typename... Vs>
- struct set_value_member_trait<T, void(Vs...),
- typename void_type<
- decltype(declval<T>().set_value(declval<Vs>()...))
- >::type>
- {
- BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
- using result_type = decltype(
- declval<T>().set_value(declval<Vs>()...));
- BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = noexcept(
- declval<T>().set_value(declval<Vs>()...)));
- };
- #else // defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
- template <typename T>
- struct set_value_member_trait<T, void(),
- typename void_type<
- decltype(declval<T>().set_value())
- >::type>
- {
- BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
- using result_type = decltype(declval<T>().set_value());
- BOOST_ASIO_STATIC_CONSTEXPR(bool,
- is_noexcept = noexcept(declval<T>().set_value()));
- };
- #define BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_TRAIT_DEF(n) \
- template <typename T, BOOST_ASIO_VARIADIC_TPARAMS(n)> \
- struct set_value_member_trait<T, void(BOOST_ASIO_VARIADIC_TARGS(n)), \
- typename void_type< \
- decltype(declval<T>().set_value(BOOST_ASIO_VARIADIC_DECLVAL(n))) \
- >::type> \
- { \
- BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true); \
- \
- using result_type = decltype( \
- declval<T>().set_value(BOOST_ASIO_VARIADIC_DECLVAL(n))); \
- \
- BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = noexcept( \
- declval<T>().set_value(BOOST_ASIO_VARIADIC_DECLVAL(n)))); \
- }; \
- /**/
- BOOST_ASIO_VARIADIC_GENERATE(BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_TRAIT_DEF)
- #undef BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_TRAIT_DEF
- #endif // defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
- #else // defined(BOOST_ASIO_HAS_DEDUCED_SET_VALUE_MEMBER_TRAIT)
- template <typename T, typename Vs, typename = void>
- struct set_value_member_trait;
- #if defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
- template <typename T, typename... Vs>
- struct set_value_member_trait<T, void(Vs...)> :
- conditional<
- is_same<T, typename remove_reference<T>::type>::value
- && conjunction<is_same<Vs, typename decay<Vs>::type>...>::value,
- typename conditional<
- is_same<T, typename add_const<T>::type>::value,
- no_set_value_member,
- traits::set_value_member<typename add_const<T>::type, void(Vs...)>
- >::type,
- traits::set_value_member<
- typename remove_reference<T>::type,
- void(typename decay<Vs>::type...)>
- >::type
- {
- };
- #else // defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
- template <typename T>
- struct set_value_member_trait<T, void()> :
- conditional<
- is_same<T, typename remove_reference<T>::type>::value,
- typename conditional<
- is_same<T, typename add_const<T>::type>::value,
- no_set_value_member,
- traits::set_value_member<typename add_const<T>::type, void()>
- >::type,
- traits::set_value_member<typename remove_reference<T>::type, void()>
- >::type
- {
- };
- #define BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME(n) \
- BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_##n
- #define BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_1 \
- && is_same<T1, typename decay<T1>::type>::value
- #define BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_2 \
- BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_1 \
- && is_same<T2, typename decay<T2>::type>::value
- #define BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_3 \
- BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_2 \
- && is_same<T3, typename decay<T3>::type>::value
- #define BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_4 \
- BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_3 \
- && is_same<T4, typename decay<T4>::type>::value
- #define BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_5 \
- BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_4 \
- && is_same<T5, typename decay<T5>::type>::value
- #define BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_6 \
- BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_5 \
- && is_same<T6, typename decay<T6>::type>::value
- #define BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_7 \
- BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_6 \
- && is_same<T7, typename decay<T7>::type>::value
- #define BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_8 \
- BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_7 \
- && is_same<T8, typename decay<T8>::type>::value
- #define BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_TRAIT_DEF(n) \
- template <typename T, BOOST_ASIO_VARIADIC_TPARAMS(n)> \
- struct set_value_member_trait<T, void(BOOST_ASIO_VARIADIC_TARGS(n))> : \
- conditional< \
- is_same<T, typename remove_reference<T>::type>::value \
- BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME(n), \
- typename conditional< \
- is_same<T, typename add_const<T>::type>::value, \
- no_set_value_member, \
- traits::set_value_member< \
- typename add_const<T>::type, \
- void(BOOST_ASIO_VARIADIC_TARGS(n))> \
- >::type, \
- traits::set_value_member< \
- typename remove_reference<T>::type, \
- void(BOOST_ASIO_VARIADIC_DECAY(n))> \
- >::type \
- { \
- }; \
- /**/
- BOOST_ASIO_VARIADIC_GENERATE(BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_TRAIT_DEF)
- #undef BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_TRAIT_DEF
- #undef BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME
- #undef BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_1
- #undef BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_2
- #undef BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_3
- #undef BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_4
- #undef BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_5
- #undef BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_6
- #undef BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_7
- #undef BOOST_ASIO_PRIVATE_SET_VALUE_MEMBER_IS_SAME_8
- #endif // defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
- #endif // defined(BOOST_ASIO_HAS_DEDUCED_SET_VALUE_MEMBER_TRAIT)
- } // namespace detail
- namespace traits {
- template <typename T, typename Vs, typename>
- struct set_value_member_default :
- detail::set_value_member_trait<T, Vs>
- {
- };
- template <typename T, typename Vs, typename>
- struct set_value_member :
- set_value_member_default<T, Vs>
- {
- };
- } // namespace traits
- } // namespace asio
- } // namespace boost
- #include <boost/asio/detail/pop_options.hpp>
- #endif // BOOST_ASIO_TRAITS_SET_VALUE_MEMBER_HPP
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