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 // UNSUPPORTED: no-threads 10 // UNSUPPORTED: c++03, c++11, c++14, c++17 11 // XFAIL: availability-synchronization_library-missing 12 13 // [[nodiscard]] id get_id() const noexcept; 14 15 #include <cassert> 16 #include <concepts> 17 #include <thread> 18 #include <type_traits> 19 20 #include "make_test_thread.h" 21 #include "test_macros.h" 22 23 static_assert(noexcept(std::declval<const std::jthread&>().get_id())); 24 25 int main(int, char**) { 26 // Does not represent a thread 27 { 28 const std::jthread jt; 29 std::same_as<std::jthread::id> decltype(auto) result = jt.get_id(); 30 assert(result == std::jthread::id()); 31 } 32 33 // Represents a thread 34 { 35 const std::jthread jt = support::make_test_jthread([] {}); 36 std::same_as<std::jthread::id> decltype(auto) result = jt.get_id(); 37 assert(result != std::jthread::id()); 38 } 39 40 return 0; 41 } 42