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& operator=(unique_lock&& u);
14 
15 #include <cassert>
16 #include <memory>
17 #include <mutex>
18 
19 #include "checking_mutex.h"
20 
21 int main(int, char**) {
22   checking_mutex m0;
23   checking_mutex m1;
24   std::unique_lock<checking_mutex> lk0(m0);
25   std::unique_lock<checking_mutex> lk1(m1);
26 
27   auto& result = (lk1 = std::move(lk0));
28 
29   assert(&result == &lk1);
30   assert(lk1.mutex() == std::addressof(m0));
31   assert(lk1.owns_lock());
32   assert(lk0.mutex() == nullptr);
33   assert(!lk0.owns_lock());
34 
35   return 0;
36 }
37