libcxx/test/std/thread/thread.latch/ctor.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++03, c++11, c++14, c++17
  11
  12 // <latch>
  13
  14 // inline constexpr explicit latch(ptrdiff_t __expected);
  15
  16 // Make sure that the ctor of latch is constexpr and explicit.
  17
  18 #include <latch>
  19
  20 #include "test_convertible.h"
  21
  22 static_assert(!test_convertible<std::latch, std::ptrdiff_t>(), "This constructor must be explicit");
  23
  24 constexpr bool test() {
  25   std::latch l(5);
  26   (void)l;
  27   return true;
  28 }
  29
  30 int main(int, char**) {
  31   test();
  32   static_assert(test(), "");
  33
  34   return 0;
  35 }