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Diffstat (limited to '3rdparty/asio/include/asio/traits/query_static_constexpr_member.hpp')
-rw-r--r-- | 3rdparty/asio/include/asio/traits/query_static_constexpr_member.hpp | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/3rdparty/asio/include/asio/traits/query_static_constexpr_member.hpp b/3rdparty/asio/include/asio/traits/query_static_constexpr_member.hpp new file mode 100644 index 00000000000..2c6eb839dd9 --- /dev/null +++ b/3rdparty/asio/include/asio/traits/query_static_constexpr_member.hpp @@ -0,0 +1,108 @@ +// +// traits/query_static_constexpr_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 ASIO_TRAITS_QUERY_STATIC_CONSTEXPR_MEMBER_HPP +#define ASIO_TRAITS_QUERY_STATIC_CONSTEXPR_MEMBER_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" + +#if defined(ASIO_HAS_DECLTYPE) \ + && defined(ASIO_HAS_NOEXCEPT) \ + && defined(ASIO_HAS_CONSTEXPR) \ + && defined(ASIO_HAS_CONSTANT_EXPRESSION_SFINAE) \ + && defined(ASIO_HAS_WORKING_EXPRESSION_SFINAE) +# define ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT 1 +#endif // defined(ASIO_HAS_DECLTYPE) + // && defined(ASIO_HAS_NOEXCEPT) + // && defined(ASIO_HAS_CONSTEXPR) + // && defined(ASIO_HAS_CONSTANT_EXPRESSION_SFINAE) + // && defined(ASIO_HAS_WORKING_EXPRESSION_SFINAE) + +#include "asio/detail/push_options.hpp" + +namespace asio { +namespace traits { + +template <typename T, typename Property, typename = void> +struct query_static_constexpr_member_default; + +template <typename T, typename Property, typename = void> +struct query_static_constexpr_member; + +} // namespace traits +namespace detail { + +struct no_query_static_constexpr_member +{ + ASIO_STATIC_CONSTEXPR(bool, is_valid = false); +}; + +template <typename T, typename Property, typename = void> +struct query_static_constexpr_member_trait : + conditional< + is_same<T, typename decay<T>::type>::value + && is_same<Property, typename decay<Property>::type>::value, + no_query_static_constexpr_member, + traits::query_static_constexpr_member< + typename decay<T>::type, + typename decay<Property>::type> + >::type +{ +}; + +#if defined(ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT) + +template <typename T, typename Property> +struct query_static_constexpr_member_trait<T, Property, + typename enable_if< + (static_cast<void>(T::query(Property{})), true) + >::type> +{ + ASIO_STATIC_CONSTEXPR(bool, is_valid = true); + + using result_type = decltype(T::query(Property{})); + + ASIO_STATIC_CONSTEXPR(bool, is_noexcept = + noexcept(T::query(Property{}))); + + static ASIO_CONSTEXPR result_type value() noexcept(is_noexcept) + { + return T::query(Property{}); + } +}; + +#endif // defined(ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT) + +} // namespace detail +namespace traits { + +template <typename T, typename Property, typename> +struct query_static_constexpr_member_default : + detail::query_static_constexpr_member_trait<T, Property> +{ +}; + +template <typename T, typename Property, typename> +struct query_static_constexpr_member : + query_static_constexpr_member_default<T, Property> +{ +}; + +} // namespace traits +} // namespace asio + +#include "asio/detail/pop_options.hpp" + +#endif // ASIO_TRAITS_QUERY_STATIC_CONSTEXPR_MEMBER_HPP |