libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.cons/copy_assign.compile.fail.cpp

   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 const&) = delete;
  14
  15 #include <mutex>
  16 #include <cassert>
  17
  18 int main(int, char**)
  19 {
  20     {
  21     typedef std::mutex M;
  22     M m0;
  23     M m1;
  24     std::unique_lock<M> lk0(m0);
  25     std::unique_lock<M> 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
  33   return 0;
  34 }