libcxx/test/std/thread/thread.mutex/thread.once/thread.once.onceflag/default.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
  11 // <mutex>
  12
  13 // struct once_flag;
  14
  15 // constexpr once_flag() noexcept;
  16
  17 #include <mutex>
  18 #include "test_macros.h"
  19
  20 int main(int, char**)
  21 {
  22     {
  23     std::once_flag f;
  24     (void)f;
  25     }
  26 #if TEST_STD_VER >= 11
  27     {
  28     constexpr std::once_flag f;
  29     (void)f;
  30     }
  31 #endif
  32
  33   return 0;
  34 }