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]] stop_token get_token() const noexcept; 14*b77e50e6SHui 15*b77e50e6SHui #include <cassert> 16*b77e50e6SHui #include <concepts> 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 IsGetTokenNoexcept = requires(const T& t) { 24*b77e50e6SHui { t.get_token() } noexcept; 25*b77e50e6SHui }; 26*b77e50e6SHui 27*b77e50e6SHui static_assert(IsGetTokenNoexcept<std::stop_source>); 28*b77e50e6SHui 29*b77e50e6SHui int main(int, char**) { 30*b77e50e6SHui // no state 31*b77e50e6SHui { 32*b77e50e6SHui std::stop_source ss{std::nostopstate}; 33*b77e50e6SHui std::same_as<std::stop_token> decltype(auto) st = ss.get_token(); 34*b77e50e6SHui assert(!st.stop_possible()); 35*b77e50e6SHui assert(!st.stop_requested()); 36*b77e50e6SHui } 37*b77e50e6SHui 38*b77e50e6SHui // with state 39*b77e50e6SHui { 40*b77e50e6SHui std::stop_source ss; 41*b77e50e6SHui std::same_as<std::stop_token> decltype(auto) st = ss.get_token(); 42*b77e50e6SHui assert(st.stop_possible()); 43*b77e50e6SHui assert(!st.stop_requested()); 44*b77e50e6SHui 45*b77e50e6SHui ss.request_stop(); 46*b77e50e6SHui assert(st.stop_requested()); 47*b77e50e6SHui } 48*b77e50e6SHui 49*b77e50e6SHui return 0; 50*b77e50e6SHui } 51