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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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef __LIBCPP___COROUTINE_TRIVIAL_AWAITABLES_H10#define __LIBCPP___COROUTINE_TRIVIAL_AWAITABLES_H11 12#include <__config>13#include <__coroutine/coroutine_handle.h>14 15#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)16# pragma GCC system_header17#endif18 19#if _LIBCPP_STD_VER >= 2020 21_LIBCPP_BEGIN_NAMESPACE_STD22 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_STD37 38#endif // _LIBCPP_STD_VER >= 2039 40#endif // __LIBCPP___COROUTINE_TRIVIAL_AWAITABLES_H41