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: libcpp-has-no-experimental-stop_token
11// UNSUPPORTED: c++03, c++11, c++14, c++17
12// XFAIL: availability-synchronization_library-missing
13
14// [[nodiscard]] bool stop_possible() const noexcept;
15// Returns: true if *this has ownership of a stop state; otherwise, false.
16
17#include <cassert>
18#include <stop_token>
19#include <type_traits>
20
21#include "test_macros.h"
22
23template <class T>
24concept IsStopPossibleNoexcept = requires(const T& t) {
25 { t.stop_possible() } noexcept;
26};
27
28static_assert(IsStopPossibleNoexcept<std::stop_source>);
29
30int main(int, char**) {
31 // no state
32 {
33 const std::stop_source st{std::nostopstate};
34 assert(!st.stop_possible());
35 }
36
37 // with state
38 {
39 const std::stop_source st;
40 assert(st.stop_possible());
41 }
42
43 return 0;
44}
45

source code of libcxx/test/std/thread/thread.stoptoken/stopsource/stop_possible.pass.cpp