1 //===----------------------------------------------------------------------===//
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
7 //===----------------------------------------------------------------------===//
9 // UNSUPPORTED: no-threads
10 // UNSUPPORTED: c++03, c++11, c++14, c++17
11 // XFAIL: availability-synchronization_library-missing
13 // friend void swap(stop_token& x, stop_token& y) noexcept;
18 #include <type_traits>
20 #include "test_macros.h"
23 concept IsNoThrowFreeSwappable
= requires(T
& t
) {
24 { swap(t
, t
) } noexcept
;
27 static_assert(IsNoThrowFreeSwappable
<std::stop_token
>);
29 int main(int, char**) {
33 std::stop_source source
;
34 auto st2
= source
.get_token();
38 source
.request_stop();
40 assert(!st1
.stop_requested());
41 assert(st2
.stop_requested());
46 assert(st1
.stop_requested());
47 assert(!st2
.stop_requested());