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
23static_assert(noexcept(std::declval<const std::jthread&>().get_id()));
24
25int 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

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source code of libcxx/test/std/thread/thread.jthread/get_id.pass.cpp