libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.shared/implicit_ctad.pass.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++98, c++03, c++11, c++14
  11
  12 // XFAIL: availability-shared_mutex-missing
  13
  14 // <shared_mutex>
  15
  16 // shared_lock
  17
  18 // Make sure that the implicitly-generated CTAD works.
  19
  20 #include <shared_mutex>
  21
  22 #include "test_macros.h"
  23
  24 int main(int, char**) {
  25   std::shared_mutex mutex;
  26   {
  27     std::shared_lock lock(mutex);
  28     ASSERT_SAME_TYPE(decltype(lock), std::shared_lock<std::shared_mutex>);
  29   }
  30
  31   return 0;
  32 }