47 lines
1.5 KiB
C++
47 lines
1.5 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef __LIBCPP___COROUTINE_TRIVIAL_AWAITABLES_H
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#define __LIBCPP___COROUTINE_TRIVIAL_AWAITABLES_H
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#include <__config>
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#include <__coroutine/coroutine_handle.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_CXX20_COROUTINES)
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_LIBCPP_BEGIN_NAMESPACE_STD
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// [coroutine.trivial.awaitables]
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struct suspend_never {
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_LIBCPP_HIDE_FROM_ABI
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constexpr bool await_ready() const noexcept { return true; }
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_LIBCPP_HIDE_FROM_ABI
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constexpr void await_suspend(coroutine_handle<>) const noexcept {}
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_LIBCPP_HIDE_FROM_ABI
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constexpr void await_resume() const noexcept {}
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};
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struct suspend_always {
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_LIBCPP_HIDE_FROM_ABI
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constexpr bool await_ready() const noexcept { return false; }
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_LIBCPP_HIDE_FROM_ABI
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constexpr void await_suspend(coroutine_handle<>) const noexcept {}
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_LIBCPP_HIDE_FROM_ABI
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constexpr void await_resume() const noexcept {}
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};
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_LIBCPP_END_NAMESPACE_STD
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#endif // __LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_CXX20_COROUTINES)
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#endif // __LIBCPP___COROUTINE_TRIVIAL_AWAITABLES_H
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