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Diffstat (limited to '3rdparty/asio/include/asio/execution/set_error.hpp')
-rw-r--r-- | 3rdparty/asio/include/asio/execution/set_error.hpp | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/3rdparty/asio/include/asio/execution/set_error.hpp b/3rdparty/asio/include/asio/execution/set_error.hpp new file mode 100644 index 00000000000..2aa3de3a6fc --- /dev/null +++ b/3rdparty/asio/include/asio/execution/set_error.hpp @@ -0,0 +1,250 @@ +// +// execution/set_error.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_EXECUTION_SET_ERROR_HPP +#define ASIO_EXECUTION_SET_ERROR_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" +#include "asio/traits/set_error_member.hpp" +#include "asio/traits/set_error_free.hpp" + +#include "asio/detail/push_options.hpp" + +#if defined(GENERATING_DOCUMENTATION) + +namespace asio { +namespace execution { + +/// A customisation point that delivers an error notification to a receiver. +/** + * The name <tt>execution::set_error</tt> denotes a customisation point object. + * The expression <tt>execution::set_error(R, E)</tt> for some subexpressions + * <tt>R</tt> and <tt>E</tt> are expression-equivalent to: + * + * @li <tt>R.set_error(E)</tt>, if that expression is valid. If the function + * selected does not send the error <tt>E</tt> to the receiver <tt>R</tt>'s + * error channel, the program is ill-formed with no diagnostic required. + * + * @li Otherwise, <tt>set_error(R, E)</tt>, if that expression is valid, with + * overload resolution performed in a context that includes the declaration + * <tt>void set_error();</tt> and that does not include a declaration of + * <tt>execution::set_error</tt>. If the function selected by overload + * resolution does not send the error <tt>E</tt> to the receiver <tt>R</tt>'s + * error channel, the program is ill-formed with no diagnostic required. + * + * @li Otherwise, <tt>execution::set_error(R, E)</tt> is ill-formed. + */ +inline constexpr unspecified set_error = unspecified; + +/// A type trait that determines whether a @c set_error expression is +/// well-formed. +/** + * Class template @c can_set_error is a trait that is derived from + * @c true_type if the expression <tt>execution::set_error(std::declval<R>(), + * std::declval<E>())</tt> is well formed; otherwise @c false_type. + */ +template <typename R, typename E> +struct can_set_error : + integral_constant<bool, automatically_determined> +{ +}; + +} // namespace execution +} // namespace asio + +#else // defined(GENERATING_DOCUMENTATION) + +namespace asio_execution_set_error_fn { + +using asio::decay; +using asio::declval; +using asio::enable_if; +using asio::traits::set_error_free; +using asio::traits::set_error_member; + +void set_error(); + +enum overload_type +{ + call_member, + call_free, + ill_formed +}; + +template <typename R, typename E, typename = void, typename = void> +struct call_traits +{ + ASIO_STATIC_CONSTEXPR(overload_type, overload = ill_formed); + ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false); + typedef void result_type; +}; + +template <typename R, typename E> +struct call_traits<R, void(E), + typename enable_if< + set_error_member<R, E>::is_valid + >::type> : + set_error_member<R, E> +{ + ASIO_STATIC_CONSTEXPR(overload_type, overload = call_member); +}; + +template <typename R, typename E> +struct call_traits<R, void(E), + typename enable_if< + !set_error_member<R, E>::is_valid + >::type, + typename enable_if< + set_error_free<R, E>::is_valid + >::type> : + set_error_free<R, E> +{ + ASIO_STATIC_CONSTEXPR(overload_type, overload = call_free); +}; + +struct impl +{ +#if defined(ASIO_HAS_MOVE) + template <typename R, typename E> + ASIO_CONSTEXPR typename enable_if< + call_traits<R, void(E)>::overload == call_member, + typename call_traits<R, void(E)>::result_type + >::type + operator()(R&& r, E&& e) const + ASIO_NOEXCEPT_IF(( + call_traits<R, void(E)>::is_noexcept)) + { + return ASIO_MOVE_CAST(R)(r).set_error(ASIO_MOVE_CAST(E)(e)); + } + + template <typename R, typename E> + ASIO_CONSTEXPR typename enable_if< + call_traits<R, void(E)>::overload == call_free, + typename call_traits<R, void(E)>::result_type + >::type + operator()(R&& r, E&& e) const + ASIO_NOEXCEPT_IF(( + call_traits<R, void(E)>::is_noexcept)) + { + return set_error(ASIO_MOVE_CAST(R)(r), ASIO_MOVE_CAST(E)(e)); + } +#else // defined(ASIO_HAS_MOVE) + template <typename R, typename E> + ASIO_CONSTEXPR typename enable_if< + call_traits<R&, void(const E&)>::overload == call_member, + typename call_traits<R&, void(const E&)>::result_type + >::type + operator()(R& r, const E& e) const + ASIO_NOEXCEPT_IF(( + call_traits<R&, void(const E&)>::is_noexcept)) + { + return r.set_error(e); + } + + template <typename R, typename E> + ASIO_CONSTEXPR typename enable_if< + call_traits<const R&, void(const E&)>::overload == call_member, + typename call_traits<const R&, void(const E&)>::result_type + >::type + operator()(const R& r, const E& e) const + ASIO_NOEXCEPT_IF(( + call_traits<const R&, void(const E&)>::is_noexcept)) + { + return r.set_error(e); + } + + template <typename R, typename E> + ASIO_CONSTEXPR typename enable_if< + call_traits<R&, void(const E&)>::overload == call_free, + typename call_traits<R&, void(const E&)>::result_type + >::type + operator()(R& r, const E& e) const + ASIO_NOEXCEPT_IF(( + call_traits<R&, void(const E&)>::is_noexcept)) + { + return set_error(r, e); + } + + template <typename R, typename E> + ASIO_CONSTEXPR typename enable_if< + call_traits<const R&, void(const E&)>::overload == call_free, + typename call_traits<const R&, void(const E&)>::result_type + >::type + operator()(const R& r, const E& e) const + ASIO_NOEXCEPT_IF(( + call_traits<const R&, void(const E&)>::is_noexcept)) + { + return set_error(r, e); + } +#endif // defined(ASIO_HAS_MOVE) +}; + +template <typename T = impl> +struct static_instance +{ + static const T instance; +}; + +template <typename T> +const T static_instance<T>::instance = {}; + +} // namespace asio_execution_set_error_fn +namespace asio { +namespace execution { +namespace { + +static ASIO_CONSTEXPR const asio_execution_set_error_fn::impl& + set_error = asio_execution_set_error_fn::static_instance<>::instance; + +} // namespace + +template <typename R, typename E> +struct can_set_error : + integral_constant<bool, + asio_execution_set_error_fn::call_traits<R, void(E)>::overload != + asio_execution_set_error_fn::ill_formed> +{ +}; + +#if defined(ASIO_HAS_VARIABLE_TEMPLATES) + +template <typename R, typename E> +constexpr bool can_set_error_v = can_set_error<R, E>::value; + +#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES) + +template <typename R, typename E> +struct is_nothrow_set_error : + integral_constant<bool, + asio_execution_set_error_fn::call_traits<R, void(E)>::is_noexcept> +{ +}; + +#if defined(ASIO_HAS_VARIABLE_TEMPLATES) + +template <typename R, typename E> +constexpr bool is_nothrow_set_error_v + = is_nothrow_set_error<R, E>::value; + +#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES) + +} // namespace execution +} // namespace asio + +#endif // defined(GENERATING_DOCUMENTATION) + +#include "asio/detail/pop_options.hpp" + +#endif // ASIO_EXECUTION_SET_ERROR_HPP |