copy_assign.fail.cpp revision 11cd02dfb91661c65134cac258cf5924270e9d2b 
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& operator=(unique_lock const&) = delete;
15
16#include <mutex>
17#include <cassert>
18
19std::mutex m0;
20std::mutex m1;
21
22int main()
23{
24    std::unique_lock<std::mutex> lk0(m0);
25    std::unique_lock<std::mutex> lk1(m1);
26    lk1 = lk0;
27    assert(lk1.mutex() == &m0);
28    assert(lk1.owns_lock() == true);
29    assert(lk0.mutex() == nullptr);
30    assert(lk0.owns_lock() == false);
31}
32