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// <mutex>
10
11// template <class Mutex> class unique_lock;
12
13// unique_lock();
14
15#include <cassert>
16#include <mutex>
17#include <type_traits>
18
19#include "checking_mutex.h"
20#include "test_macros.h"
21
22#if TEST_STD_VER >= 11
23static_assert(std::is_nothrow_default_constructible<std::unique_lock<checking_mutex>>::value, "");
24#endif
25
26int main(int, char**) {
27 std::unique_lock<checking_mutex> ul;
28 assert(!ul.owns_lock());
29 assert(ul.mutex() == nullptr);
30
31 return 0;
32}
33

source code of libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.cons/default.pass.cpp