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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-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] |
| 24 | struct 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 | |
| 30 | struct 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 |
| 41 |
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