1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: no-threads
// UNSUPPORTED: libcpp-has-no-experimental-stop_token
// UNSUPPORTED: c++03, c++11, c++14, c++17
// XFAIL: availability-synchronization_library-missing
// [[nodiscard]] bool stop_possible() const noexcept;
// Returns: true if *this has ownership of a stop state; otherwise, false.
#include <cassert>
#include <stop_token>
#include <type_traits>
#include "test_macros.h"
template <class T>
concept IsStopPossibleNoexcept = requires(const T& t) {
{ t.stop_possible() } noexcept;
};
static_assert(IsStopPossibleNoexcept<std::stop_source>);
int main(int, char**) {
// no state
{
const std::stop_source st{std::nostopstate};
assert(!st.stop_possible());
}
// with state
{
const std::stop_source st;
assert(st.stop_possible());
}
return 0;
}
|
