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// <mutex>
11
12// template <class Mutex> class unique_lock;
13
14// unique_lock();
15
16#include <mutex>
17#include <cassert>
18
19int main()
20{
21    std::unique_lock<std::mutex> ul;
22    assert(!ul.owns_lock());
23    assert(ul.mutex() == nullptr);
24}
25