12e6ae1d3SChuanqi Xu //===----------------------------------------------------------------------===// 22e6ae1d3SChuanqi Xu // 32e6ae1d3SChuanqi Xu // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 42e6ae1d3SChuanqi Xu // See https://llvm.org/LICENSE.txt for license information. 52e6ae1d3SChuanqi Xu // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 62e6ae1d3SChuanqi Xu // 72e6ae1d3SChuanqi Xu //===----------------------------------------------------------------------===// 82e6ae1d3SChuanqi Xu 92e6ae1d3SChuanqi Xu #ifndef __LIBCPP___COROUTINE_TRIVIAL_AWAITABLES_H 102e6ae1d3SChuanqi Xu #define __LIBCPP___COROUTINE_TRIVIAL_AWAITABLES_H 112e6ae1d3SChuanqi Xu 122e6ae1d3SChuanqi Xu #include <__config> 132e6ae1d3SChuanqi Xu #include <__coroutine/coroutine_handle.h> 142e6ae1d3SChuanqi Xu 152e6ae1d3SChuanqi Xu #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 162e6ae1d3SChuanqi Xu # pragma GCC system_header 172e6ae1d3SChuanqi Xu #endif 182e6ae1d3SChuanqi Xu 194f15267dSNikolas Klauser #if _LIBCPP_STD_VER >= 20 202e6ae1d3SChuanqi Xu 212e6ae1d3SChuanqi Xu _LIBCPP_BEGIN_NAMESPACE_STD 222e6ae1d3SChuanqi Xu 232e6ae1d3SChuanqi Xu // [coroutine.trivial.awaitables] 242e6ae1d3SChuanqi Xu struct suspend_never { await_readysuspend_never25*9783f28cSLouis Dionne _LIBCPP_HIDE_FROM_ABI constexpr bool await_ready() const noexcept { return true; } await_suspendsuspend_never26*9783f28cSLouis Dionne _LIBCPP_HIDE_FROM_ABI constexpr void await_suspend(coroutine_handle<>) const noexcept {} await_resumesuspend_never27*9783f28cSLouis Dionne _LIBCPP_HIDE_FROM_ABI constexpr void await_resume() const noexcept {} 282e6ae1d3SChuanqi Xu }; 292e6ae1d3SChuanqi Xu 302e6ae1d3SChuanqi Xu struct suspend_always { await_readysuspend_always31*9783f28cSLouis Dionne _LIBCPP_HIDE_FROM_ABI constexpr bool await_ready() const noexcept { return false; } await_suspendsuspend_always32*9783f28cSLouis Dionne _LIBCPP_HIDE_FROM_ABI constexpr void await_suspend(coroutine_handle<>) const noexcept {} await_resumesuspend_always33*9783f28cSLouis Dionne _LIBCPP_HIDE_FROM_ABI constexpr void await_resume() const noexcept {} 342e6ae1d3SChuanqi Xu }; 352e6ae1d3SChuanqi Xu 362e6ae1d3SChuanqi Xu _LIBCPP_END_NAMESPACE_STD 372e6ae1d3SChuanqi Xu 384f15267dSNikolas Klauser #endif // __LIBCPP_STD_VER >= 20 392e6ae1d3SChuanqi Xu 402e6ae1d3SChuanqi Xu #endif // __LIBCPP___COROUTINE_TRIVIAL_AWAITABLES_H 41