1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// UNSUPPORTED: libcpp-has-no-threads
11
12// <mutex>
13
14// template <class Mutex> class unique_lock;
15
16// unique_lock();
17
18#include <mutex>
19#include <cassert>
20
21int main()
22{
23    std::unique_lock<std::mutex> ul;
24    assert(!ul.owns_lock());
25    assert(ul.mutex() == nullptr);
26}
27