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 lock_guard;
13
14// lock_guard& operator=(lock_guard const&) = delete;
15
16#include <mutex>
17
18int main()
19{
20    std::mutex m0;
21    std::mutex m1;
22    std::lock_guard<std::mutex> lg0(m0);
23    std::lock_guard<std::mutex> lg(m1);
24    lg = lg0;
25}
26