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
12// struct nostopstate_t {
13// explicit nostopstate_t() = default;
14// };
15//
16// inline constexpr nostopstate_t nostopstate{};
17
18#include <concepts>
19#include <stop_token>
20#include <type_traits>
21
22#include "test_macros.h"
23
24static_assert(std::is_trivially_default_constructible_v<std::nostopstate_t>);
25
26struct Empty {};
27static_assert(sizeof(Empty) == sizeof(std::nostopstate_t));
28
29template <class T>
30void conversionTest(T);
31
32template <class T>
33concept ImplicitlyDefaultConstructible = requires { conversionTest<T>({}); };
34static_assert(!ImplicitlyDefaultConstructible<std::nostopstate_t>);
35
36int main(int, char**) {
37 [[maybe_unused]] std::same_as<std::nostopstate_t> auto x = std::nostopstate;
38 [[maybe_unused]] auto y = std::nostopstate_t{};
39
40 return 0;
41}
42

source code of libcxx/test/std/thread/thread.stoptoken/nostopstate/cons.default.pass.cpp