libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.scoped/assign.verify.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 // UNSUPPORTED: no-threads
  10 // UNSUPPORTED: c++03, c++11, c++14
  11
  12 // <mutex>
  13
  14 // template <class ...Mutex> class scoped_lock;
  15
  16 // scoped_lock& operator=(scoped_lock const&) = delete;
  17
  18 #include <mutex>
  19 #include "test_macros.h"
  20
  21 int main(int, char**)
  22 {
  23     using M = std::mutex;
  24     M m0, m1, m2;
  25     M om0, om1, om2;
  26     {
  27         using LG = std::scoped_lock<>;
  28         LG lg1, lg2;
  29         lg1 = lg2; // expected-error{{overload resolution selected deleted operator '='}}
  30     }
  31     {
  32         using LG = std::scoped_lock<M>;
  33         LG lg1(m0);
  34         LG lg2(om0);
  35         lg1 = lg2; // expected-error{{overload resolution selected deleted operator '='}}
  36     }
  37     {
  38         using LG = std::scoped_lock<M, M>;
  39         LG lg1(m0, m1);
  40         LG lg2(om0, om1);
  41         lg1 = lg2; // expected-error{{overload resolution selected deleted operator '='}}
  42     }
  43     {
  44         using LG = std::scoped_lock<M, M, M>;
  45         LG lg1(m0, m1, m2);
  46         LG lg2(om0, om1, om2);
  47         lg1 = lg2; // expected-error{{overload resolution selected deleted operator '='}}
  48     }
  49
  50   return 0;
  51 }