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 
19 std::mutex m;
20 
main()21 int 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