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Diffstat (limited to '3rdparty/asio/include/asio/traits/static_query.hpp')
-rw-r--r-- | 3rdparty/asio/include/asio/traits/static_query.hpp | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/3rdparty/asio/include/asio/traits/static_query.hpp b/3rdparty/asio/include/asio/traits/static_query.hpp new file mode 100644 index 00000000000..d2a96aae85d --- /dev/null +++ b/3rdparty/asio/include/asio/traits/static_query.hpp @@ -0,0 +1,108 @@ +// +// traits/static_query.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_STATIC_QUERY_HPP +#define ASIO_TRAITS_STATIC_QUERY_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_VARIABLE_TEMPLATES) \ + && defined(ASIO_HAS_WORKING_EXPRESSION_SFINAE) +# define ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT 1 +#endif // defined(ASIO_HAS_DECLTYPE) + // && defined(ASIO_HAS_NOEXCEPT) + // && defined(ASIO_HAS_CONSTEXPR) + // && defined(ASIO_HAS_VARIABLE_TEMPLATES) + // && defined(ASIO_HAS_WORKING_EXPRESSION_SFINAE) + +#include "asio/detail/push_options.hpp" + +namespace asio { +namespace traits { + +template <typename T, typename Property, typename = void> +struct static_query_default; + +template <typename T, typename Property, typename = void> +struct static_query; + +} // namespace traits +namespace detail { + +struct no_static_query +{ + ASIO_STATIC_CONSTEXPR(bool, is_valid = false); + ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false); +}; + +template <typename T, typename Property, typename = void> +struct static_query_trait : + conditional< + is_same<T, typename decay<T>::type>::value + && is_same<Property, typename decay<Property>::type>::value, + no_static_query, + traits::static_query< + typename decay<T>::type, + typename decay<Property>::type> + >::type +{ +}; + +#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) + +template <typename T, typename Property> +struct static_query_trait<T, Property, + typename void_type< + decltype(decay<Property>::type::template static_query_v<T>) + >::type> +{ + ASIO_STATIC_CONSTEXPR(bool, is_valid = true); + + using result_type = decltype( + decay<Property>::type::template static_query_v<T>); + + ASIO_STATIC_CONSTEXPR(bool, is_noexcept = + noexcept(decay<Property>::type::template static_query_v<T>)); + + static ASIO_CONSTEXPR result_type value() noexcept(is_noexcept) + { + return decay<Property>::type::template static_query_v<T>; + } +}; + +#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) + +} // namespace detail +namespace traits { + +template <typename T, typename Property, typename> +struct static_query_default : detail::static_query_trait<T, Property> +{ +}; + +template <typename T, typename Property, typename> +struct static_query : static_query_default<T, Property> +{ +}; + +} // namespace traits +} // namespace asio + +#include "asio/detail/pop_options.hpp" + +#endif // ASIO_TRAITS_STATIC_QUERY_HPP |