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Diffstat (limited to '3rdparty/asio/include/asio/traits/start_free.hpp')
-rw-r--r-- | 3rdparty/asio/include/asio/traits/start_free.hpp | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/3rdparty/asio/include/asio/traits/start_free.hpp b/3rdparty/asio/include/asio/traits/start_free.hpp new file mode 100644 index 00000000000..2489b97c60d --- /dev/null +++ b/3rdparty/asio/include/asio/traits/start_free.hpp @@ -0,0 +1,108 @@ +// +// traits/start_free.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_START_FREE_HPP +#define ASIO_TRAITS_START_FREE_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_WORKING_EXPRESSION_SFINAE) +# define ASIO_HAS_DEDUCED_START_FREE_TRAIT 1 +#endif // defined(ASIO_HAS_DECLTYPE) + // && defined(ASIO_HAS_NOEXCEPT) + // && defined(ASIO_HAS_WORKING_EXPRESSION_SFINAE) + +#include "asio/detail/push_options.hpp" + +namespace asio { +namespace traits { + +template <typename T, typename = void> +struct start_free_default; + +template <typename T, typename = void> +struct start_free; + +} // namespace traits +namespace detail { + +struct no_start_free +{ + ASIO_STATIC_CONSTEXPR(bool, is_valid = false); + ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false); +}; + +#if defined(ASIO_HAS_DEDUCED_START_FREE_TRAIT) + +template <typename T, typename = void> +struct start_free_trait : no_start_free +{ +}; + +template <typename T> +struct start_free_trait<T, + typename void_type< + decltype(start(declval<T>())) + >::type> +{ + ASIO_STATIC_CONSTEXPR(bool, is_valid = true); + + using result_type = decltype(start(declval<T>())); + + ASIO_STATIC_CONSTEXPR(bool, + is_noexcept = noexcept(start(declval<T>()))); +}; + +#else // defined(ASIO_HAS_DEDUCED_START_FREE_TRAIT) + +template <typename T, typename = void> +struct start_free_trait : + conditional< + is_same<T, typename remove_reference<T>::type>::value, + typename conditional< + is_same<T, typename add_const<T>::type>::value, + no_start_free, + traits::start_free<typename add_const<T>::type> + >::type, + traits::start_free<typename remove_reference<T>::type> + >::type +{ +}; + +#endif // defined(ASIO_HAS_DEDUCED_START_FREE_TRAIT) + +} // namespace detail +namespace traits { + +template <typename T, typename> +struct start_free_default : + detail::start_free_trait<T> +{ +}; + +template <typename T, typename> +struct start_free : + start_free_default<T> +{ +}; + +} // namespace traits +} // namespace asio + +#include "asio/detail/pop_options.hpp" + +#endif // ASIO_TRAITS_START_FREE_HPP |