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, c++98, c++03
11
12// <mutex>
13
14// template <class Mutex> class unique_lock;
15
16// unique_lock& operator=(unique_lock&& u);
17
18#include <mutex>
19#include <cassert>
20#include "nasty_containers.hpp"
21
22int main()
23{
24    {
25    typedef std::mutex M;
26    M m0;
27    M m1;
28    std::unique_lock<M> lk0(m0);
29    std::unique_lock<M> lk1(m1);
30    lk1 = std::move(lk0);
31    assert(lk1.mutex() == std::addressof(m0));
32    assert(lk1.owns_lock() == true);
33    assert(lk0.mutex() == nullptr);
34    assert(lk0.owns_lock() == false);
35    }
36    {
37    typedef nasty_mutex M;
38    M m0;
39    M m1;
40    std::unique_lock<M> lk0(m0);
41    std::unique_lock<M> lk1(m1);
42    lk1 = std::move(lk0);
43    assert(lk1.mutex() == std::addressof(m0));
44    assert(lk1.owns_lock() == true);
45    assert(lk0.mutex() == nullptr);
46    assert(lk0.owns_lock() == false);
47    }
48}
49