1*b77e50e6SHui //===----------------------------------------------------------------------===// 2*b77e50e6SHui // 3*b77e50e6SHui // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*b77e50e6SHui // See https://llvm.org/LICENSE.txt for license information. 5*b77e50e6SHui // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*b77e50e6SHui // 7*b77e50e6SHui //===----------------------------------------------------------------------===// 8*b77e50e6SHui // 9*b77e50e6SHui // UNSUPPORTED: no-threads 10*b77e50e6SHui // UNSUPPORTED: c++03, c++11, c++14, c++17 11*b77e50e6SHui // XFAIL: availability-synchronization_library-missing 12*b77e50e6SHui 13*b77e50e6SHui // [[nodiscard]] bool stop_possible() const noexcept; 14*b77e50e6SHui // Returns: true if *this has ownership of a stop state; otherwise, false. 15*b77e50e6SHui 16*b77e50e6SHui #include <cassert> 17*b77e50e6SHui #include <stop_token> 18*b77e50e6SHui #include <type_traits> 19*b77e50e6SHui 20*b77e50e6SHui #include "test_macros.h" 21*b77e50e6SHui 22*b77e50e6SHui template <class T> 23*b77e50e6SHui concept IsStopPossibleNoexcept = requires(const T& t) { 24*b77e50e6SHui { t.stop_possible() } noexcept; 25*b77e50e6SHui }; 26*b77e50e6SHui 27*b77e50e6SHui static_assert(IsStopPossibleNoexcept<std::stop_source>); 28*b77e50e6SHui 29*b77e50e6SHui int main(int, char**) { 30*b77e50e6SHui // no state 31*b77e50e6SHui { 32*b77e50e6SHui const std::stop_source st{std::nostopstate}; 33*b77e50e6SHui assert(!st.stop_possible()); 34*b77e50e6SHui } 35*b77e50e6SHui 36*b77e50e6SHui // with state 37*b77e50e6SHui { 38*b77e50e6SHui const std::stop_source st; 39*b77e50e6SHui assert(st.stop_possible()); 40*b77e50e6SHui } 41*b77e50e6SHui 42*b77e50e6SHui return 0; 43*b77e50e6SHui } 44