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Diffstat (limited to '3rdparty/asio/include/asio/execution/set_value.hpp')
-rw-r--r-- | 3rdparty/asio/include/asio/execution/set_value.hpp | 483 |
1 files changed, 483 insertions, 0 deletions
diff --git a/3rdparty/asio/include/asio/execution/set_value.hpp b/3rdparty/asio/include/asio/execution/set_value.hpp new file mode 100644 index 00000000000..90d29dda540 --- /dev/null +++ b/3rdparty/asio/include/asio/execution/set_value.hpp @@ -0,0 +1,483 @@ +// +// execution/set_value.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_VALUE_HPP +#define ASIO_EXECUTION_SET_VALUE_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/detail/variadic_templates.hpp" +#include "asio/traits/set_value_member.hpp" +#include "asio/traits/set_value_free.hpp" + +#include "asio/detail/push_options.hpp" + +#if defined(GENERATING_DOCUMENTATION) + +namespace asio { +namespace execution { + +/// A customisation point that delivers a value to a receiver. +/** + * The name <tt>execution::set_value</tt> denotes a customisation point object. + * The expression <tt>execution::set_value(R, Vs...)</tt> for some + * subexpressions <tt>R</tt> and <tt>Vs...</tt> is expression-equivalent to: + * + * @li <tt>R.set_value(Vs...)</tt>, if that expression is valid. If the + * function selected does not send the value(s) <tt>Vs...</tt> to the receiver + * <tt>R</tt>'s value channel, the program is ill-formed with no diagnostic + * required. + * + * @li Otherwise, <tt>set_value(R, Vs...)</tt>, if that expression is valid, + * with overload resolution performed in a context that includes the + * declaration <tt>void set_value();</tt> and that does not include a + * declaration of <tt>execution::set_value</tt>. If the function selected by + * overload resolution does not send the value(s) <tt>Vs...</tt> to the + * receiver <tt>R</tt>'s value channel, the program is ill-formed with no + * diagnostic required. + * + * @li Otherwise, <tt>execution::set_value(R, Vs...)</tt> is ill-formed. + */ +inline constexpr unspecified set_value = unspecified; + +/// A type trait that determines whether a @c set_value expression is +/// well-formed. +/** + * Class template @c can_set_value is a trait that is derived from + * @c true_type if the expression <tt>execution::set_value(std::declval<R>(), + * std::declval<Vs>()...)</tt> is well formed; otherwise @c false_type. + */ +template <typename R, typename... Vs> +struct can_set_value : + integral_constant<bool, automatically_determined> +{ +}; + +} // namespace execution +} // namespace asio + +#else // defined(GENERATING_DOCUMENTATION) + +namespace asio_execution_set_value_fn { + +using asio::decay; +using asio::declval; +using asio::enable_if; +using asio::traits::set_value_free; +using asio::traits::set_value_member; + +void set_value(); + +enum overload_type +{ + call_member, + call_free, + ill_formed +}; + +template <typename R, typename Vs, 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 Vs> +struct call_traits<R, Vs, + typename enable_if< + set_value_member<R, Vs>::is_valid + >::type> : + set_value_member<R, Vs> +{ + ASIO_STATIC_CONSTEXPR(overload_type, overload = call_member); +}; + +template <typename R, typename Vs> +struct call_traits<R, Vs, + typename enable_if< + !set_value_member<R, Vs>::is_valid + >::type, + typename enable_if< + set_value_free<R, Vs>::is_valid + >::type> : + set_value_free<R, Vs> +{ + ASIO_STATIC_CONSTEXPR(overload_type, overload = call_free); +}; + +struct impl +{ +#if defined(ASIO_HAS_MOVE) + +#if defined(ASIO_HAS_VARIADIC_TEMPLATES) + + template <typename R, typename... Vs> + ASIO_CONSTEXPR typename enable_if< + call_traits<R, void(Vs...)>::overload == call_member, + typename call_traits<R, void(Vs...)>::result_type + >::type + operator()(R&& r, Vs&&... v) const + ASIO_NOEXCEPT_IF(( + call_traits<R, void(Vs...)>::is_noexcept)) + { + return ASIO_MOVE_CAST(R)(r).set_value(ASIO_MOVE_CAST(Vs)(v)...); + } + + template <typename R, typename... Vs> + ASIO_CONSTEXPR typename enable_if< + call_traits<R, void(Vs...)>::overload == call_free, + typename call_traits<R, void(Vs...)>::result_type + >::type + operator()(R&& r, Vs&&... v) const + ASIO_NOEXCEPT_IF(( + call_traits<R, void(Vs...)>::is_noexcept)) + { + return set_value(ASIO_MOVE_CAST(R)(r), + ASIO_MOVE_CAST(Vs)(v)...); + } + +#else // defined(ASIO_HAS_VARIADIC_TEMPLATES) + + template <typename R> + ASIO_CONSTEXPR typename enable_if< + call_traits<R, void()>::overload == call_member, + typename call_traits<R, void()>::result_type + >::type + operator()(R&& r) const + ASIO_NOEXCEPT_IF(( + call_traits<R, void()>::is_noexcept)) + { + return ASIO_MOVE_CAST(R)(r).set_value(); + } + + template <typename R> + ASIO_CONSTEXPR typename enable_if< + call_traits<R, void()>::overload == call_free, + typename call_traits<R, void()>::result_type + >::type + operator()(R&& r) const + ASIO_NOEXCEPT_IF(( + call_traits<R, void()>::is_noexcept)) + { + return set_value(ASIO_MOVE_CAST(R)(r)); + } + +#define ASIO_PRIVATE_SET_VALUE_CALL_DEF(n) \ + template <typename R, ASIO_VARIADIC_TPARAMS(n)> \ + ASIO_CONSTEXPR typename enable_if< \ + call_traits<R, \ + void(ASIO_VARIADIC_TARGS(n))>::overload == call_member, \ + typename call_traits<R, void(ASIO_VARIADIC_TARGS(n))>::result_type \ + >::type \ + operator()(R&& r, ASIO_VARIADIC_MOVE_PARAMS(n)) const \ + ASIO_NOEXCEPT_IF(( \ + call_traits<R, void(ASIO_VARIADIC_TARGS(n))>::is_noexcept)) \ + { \ + return ASIO_MOVE_CAST(R)(r).set_value( \ + ASIO_VARIADIC_MOVE_ARGS(n)); \ + } \ + \ + template <typename R, ASIO_VARIADIC_TPARAMS(n)> \ + ASIO_CONSTEXPR typename enable_if< \ + call_traits<R, void(ASIO_VARIADIC_TARGS(n))>::overload == call_free, \ + typename call_traits<R, void(ASIO_VARIADIC_TARGS(n))>::result_type \ + >::type \ + operator()(R&& r, ASIO_VARIADIC_MOVE_PARAMS(n)) const \ + ASIO_NOEXCEPT_IF(( \ + call_traits<R, void(ASIO_VARIADIC_TARGS(n))>::is_noexcept)) \ + { \ + return set_value(ASIO_MOVE_CAST(R)(r), \ + ASIO_VARIADIC_MOVE_ARGS(n)); \ + } \ + /**/ +ASIO_VARIADIC_GENERATE(ASIO_PRIVATE_SET_VALUE_CALL_DEF) +#undef ASIO_PRIVATE_SET_VALUE_CALL_DEF + +#endif // defined(ASIO_HAS_VARIADIC_TEMPLATES) + +#else // defined(ASIO_HAS_MOVE) + +#if defined(ASIO_HAS_VARIADIC_TEMPLATES) + + template <typename R, typename... Vs> + ASIO_CONSTEXPR typename enable_if< + call_traits<R&, void(const Vs&...)>::overload == call_member, + typename call_traits<R&, void(const Vs&...)>::result_type + >::type + operator()(R& r, const Vs&... v) const + ASIO_NOEXCEPT_IF(( + call_traits<R&, void(const Vs&...)>::is_noexcept)) + { + return r.set_value(v...); + } + + template <typename R, typename... Vs> + ASIO_CONSTEXPR typename enable_if< + call_traits<const R&, void(const Vs&...)>::overload == call_member, + typename call_traits<const R&, void(const Vs&...)>::result_type + >::type + operator()(const R& r, const Vs&... v) const + ASIO_NOEXCEPT_IF(( + call_traits<const R&, void(const Vs&...)>::is_noexcept)) + { + return r.set_value(v...); + } + + template <typename R, typename... Vs> + ASIO_CONSTEXPR typename enable_if< + call_traits<R&, void(const Vs&...)>::overload == call_free, + typename call_traits<R&, void(const Vs&...)>::result_type + >::type + operator()(R& r, const Vs&... v) const + ASIO_NOEXCEPT_IF(( + call_traits<R&, void(const Vs&...)>::is_noexcept)) + { + return set_value(r, v...); + } + + template <typename R, typename... Vs> + ASIO_CONSTEXPR typename enable_if< + call_traits<const R&, void(const Vs&...)>::overload == call_free, + typename call_traits<const R&, void(const Vs&...)>::result_type + >::type + operator()(const R& r, const Vs&... v) const + ASIO_NOEXCEPT_IF(( + call_traits<const R&, void(const Vs&...)>::is_noexcept)) + { + return set_value(r, v...); + } + +#else // defined(ASIO_HAS_VARIADIC_TEMPLATES) + + template <typename R> + ASIO_CONSTEXPR typename enable_if< + call_traits<R&, void()>::overload == call_member, + typename call_traits<R&, void()>::result_type + >::type + operator()(R& r) const + ASIO_NOEXCEPT_IF(( + call_traits<R&, void()>::is_noexcept)) + { + return r.set_value(); + } + + template <typename R> + ASIO_CONSTEXPR typename enable_if< + call_traits<const R&, void()>::overload == call_member, + typename call_traits<const R&, void()>::result_type + >::type + operator()(const R& r) const + ASIO_NOEXCEPT_IF(( + call_traits<const R&, void()>::is_noexcept)) + { + return r.set_value(); + } + + template <typename R> + ASIO_CONSTEXPR typename enable_if< + call_traits<R&, void()>::overload == call_free, + typename call_traits<R&, void()>::result_type + >::type + operator()(R& r) const + ASIO_NOEXCEPT_IF(( + call_traits<R&, void()>::is_noexcept)) + { + return set_value(r); + } + + template <typename R> + ASIO_CONSTEXPR typename enable_if< + call_traits<const R&, void()>::overload == call_free, + typename call_traits<const R&, void()>::result_type + >::type + operator()(const R& r) const + ASIO_NOEXCEPT_IF(( + call_traits<const R&, void()>::is_noexcept)) + { + return set_value(r); + } + +#define ASIO_PRIVATE_SET_VALUE_CALL_DEF(n) \ + template <typename R, ASIO_VARIADIC_TPARAMS(n)> \ + ASIO_CONSTEXPR typename enable_if< \ + call_traits<R&, \ + void(ASIO_VARIADIC_TARGS(n))>::overload == call_member, \ + typename call_traits<R&, void(ASIO_VARIADIC_TARGS(n))>::result_type \ + >::type \ + operator()(R& r, ASIO_VARIADIC_MOVE_PARAMS(n)) const \ + ASIO_NOEXCEPT_IF(( \ + call_traits<R&, void(ASIO_VARIADIC_TARGS(n))>::is_noexcept)) \ + { \ + return r.set_value(ASIO_VARIADIC_MOVE_ARGS(n)); \ + } \ + \ + template <typename R, ASIO_VARIADIC_TPARAMS(n)> \ + ASIO_CONSTEXPR typename enable_if< \ + call_traits<const R&, \ + void(ASIO_VARIADIC_TARGS(n))>::overload == call_member, \ + typename call_traits<const R&, \ + void(ASIO_VARIADIC_TARGS(n))>::result_type \ + >::type \ + operator()(const R& r, ASIO_VARIADIC_MOVE_PARAMS(n)) const \ + ASIO_NOEXCEPT_IF(( \ + call_traits<const R&, void(ASIO_VARIADIC_TARGS(n))>::is_noexcept)) \ + { \ + return r.set_value(ASIO_VARIADIC_MOVE_ARGS(n)); \ + } \ + \ + template <typename R, ASIO_VARIADIC_TPARAMS(n)> \ + ASIO_CONSTEXPR typename enable_if< \ + call_traits<R&, \ + void(ASIO_VARIADIC_TARGS(n))>::overload == call_free, \ + typename call_traits<R&, void(ASIO_VARIADIC_TARGS(n))>::result_type \ + >::type \ + operator()(R& r, ASIO_VARIADIC_MOVE_PARAMS(n)) const \ + ASIO_NOEXCEPT_IF(( \ + call_traits<R&, void(ASIO_VARIADIC_TARGS(n))>::is_noexcept)) \ + { \ + return set_value(r, ASIO_VARIADIC_MOVE_ARGS(n)); \ + } \ + \ + template <typename R, ASIO_VARIADIC_TPARAMS(n)> \ + ASIO_CONSTEXPR typename enable_if< \ + call_traits<const R&, \ + void(ASIO_VARIADIC_TARGS(n))>::overload == call_free, \ + typename call_traits<const R&, \ + void(ASIO_VARIADIC_TARGS(n))>::result_type \ + >::type \ + operator()(const R& r, ASIO_VARIADIC_MOVE_PARAMS(n)) const \ + ASIO_NOEXCEPT_IF(( \ + call_traits<const R&, void(ASIO_VARIADIC_TARGS(n))>::is_noexcept)) \ + { \ + return set_value(r, ASIO_VARIADIC_MOVE_ARGS(n)); \ + } \ + /**/ +ASIO_VARIADIC_GENERATE(ASIO_PRIVATE_SET_VALUE_CALL_DEF) +#undef ASIO_PRIVATE_SET_VALUE_CALL_DEF + +#endif // defined(ASIO_HAS_VARIADIC_TEMPLATES) + +#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_value_fn +namespace asio { +namespace execution { +namespace { + +static ASIO_CONSTEXPR const asio_execution_set_value_fn::impl& + set_value = asio_execution_set_value_fn::static_instance<>::instance; + +} // namespace + +#if defined(ASIO_HAS_VARIADIC_TEMPLATES) + +template <typename R, typename... Vs> +struct can_set_value : + integral_constant<bool, + asio_execution_set_value_fn::call_traits<R, void(Vs...)>::overload != + asio_execution_set_value_fn::ill_formed> +{ +}; + +#if defined(ASIO_HAS_VARIABLE_TEMPLATES) + +template <typename R, typename... Vs> +constexpr bool can_set_value_v = can_set_value<R, Vs...>::value; + +#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES) + +template <typename R, typename... Vs> +struct is_nothrow_set_value : + integral_constant<bool, + asio_execution_set_value_fn::call_traits<R, void(Vs...)>::is_noexcept> +{ +}; + +#if defined(ASIO_HAS_VARIABLE_TEMPLATES) + +template <typename R, typename... Vs> +constexpr bool is_nothrow_set_value_v + = is_nothrow_set_value<R, Vs...>::value; + +#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES) + +#else // defined(ASIO_HAS_VARIADIC_TEMPLATES) + +template <typename R, typename = void, + typename = void, typename = void, typename = void, typename = void, + typename = void, typename = void, typename = void, typename = void> +struct can_set_value; + +template <typename R, typename = void, + typename = void, typename = void, typename = void, typename = void, + typename = void, typename = void, typename = void, typename = void> +struct is_nothrow_set_value; + +template <typename R> +struct can_set_value<R> : + integral_constant<bool, + asio_execution_set_value_fn::call_traits<R, void()>::overload != + asio_execution_set_value_fn::ill_formed> +{ +}; + +template <typename R> +struct is_nothrow_set_value<R> : + integral_constant<bool, + asio_execution_set_value_fn::call_traits<R, void()>::is_noexcept> +{ +}; + +#define ASIO_PRIVATE_SET_VALUE_TRAITS_DEF(n) \ + template <typename R, ASIO_VARIADIC_TPARAMS(n)> \ + struct can_set_value<R, ASIO_VARIADIC_TARGS(n)> : \ + integral_constant<bool, \ + asio_execution_set_value_fn::call_traits<R, \ + void(ASIO_VARIADIC_TARGS(n))>::overload != \ + asio_execution_set_value_fn::ill_formed> \ + { \ + }; \ + \ + template <typename R, ASIO_VARIADIC_TPARAMS(n)> \ + struct is_nothrow_set_value<R, ASIO_VARIADIC_TARGS(n)> : \ + integral_constant<bool, \ + asio_execution_set_value_fn::call_traits<R, \ + void(ASIO_VARIADIC_TARGS(n))>::is_noexcept> \ + { \ + }; \ + /**/ +ASIO_VARIADIC_GENERATE(ASIO_PRIVATE_SET_VALUE_TRAITS_DEF) +#undef ASIO_PRIVATE_SET_VALUE_TRAITS_DEF + +#endif // defined(ASIO_HAS_VARIADIC_TEMPLATES) + +} // namespace execution +} // namespace asio + +#endif // defined(GENERATING_DOCUMENTATION) + +#include "asio/detail/pop_options.hpp" + +#endif // ASIO_EXECUTION_SET_VALUE_HPP |