1//===----------------------------------------------------------------------===//
 2//
 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 4// See https://llvm.org/LICENSE.txt for license information.
 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 6//
 7//===----------------------------------------------------------------------===//
 8
 9#ifndef __LIBCPP___COROUTINE_TRIVIAL_AWAITABLES_H
10#define __LIBCPP___COROUTINE_TRIVIAL_AWAITABLES_H
11
12#include <__config>
13#include <__coroutine/coroutine_handle.h>
14
15#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
16#  pragma GCC system_header
17#endif
18
19#if _LIBCPP_STD_VER >= 20
20
21_LIBCPP_BEGIN_NAMESPACE_STD
22
23// [coroutine.trivial.awaitables]
24struct suspend_never {
25  _LIBCPP_HIDE_FROM_ABI constexpr bool await_ready() const noexcept { return true; }
26  _LIBCPP_HIDE_FROM_ABI constexpr void await_suspend(coroutine_handle<>) const noexcept {}
27  _LIBCPP_HIDE_FROM_ABI constexpr void await_resume() const noexcept {}
28};
29
30struct suspend_always {
31  _LIBCPP_HIDE_FROM_ABI constexpr bool await_ready() const noexcept { return false; }
32  _LIBCPP_HIDE_FROM_ABI constexpr void await_suspend(coroutine_handle<>) const noexcept {}
33  _LIBCPP_HIDE_FROM_ABI constexpr void await_resume() const noexcept {}
34};
35
36_LIBCPP_END_NAMESPACE_STD
37
38#endif // _LIBCPP_STD_VER >= 20
39
40#endif // __LIBCPP___COROUTINE_TRIVIAL_AWAITABLES_H