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(unique_lock&& u);
15
16#include <mutex>
17#include <cassert>
18
19std::mutex m;
20
21int main()
22{
23#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
24    std::unique_lock<std::mutex> lk0(m);
25    std::unique_lock<std::mutex> lk = std::move(lk0);
26    assert(lk.mutex() == &m);
27    assert(lk.owns_lock() == true);
28    assert(lk0.mutex() == nullptr);
29    assert(lk0.owns_lock() == false);
30#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
31}
32