libcxx/test/std/thread/thread.stoptoken/stoptoken/assign.move.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 // XFAIL: availability-synchronization_library-missing
  12
  13 // stop_token& operator=(stop_token&& rhs) noexcept;
  14
  15 #include <cassert>
  16 #include <concepts>
  17 #include <stop_token>
  18 #include <type_traits>
  19 #include <utility>
  20
  21 #include "test_macros.h"
  22
  23 static_assert(std::is_nothrow_move_assignable_v<std::stop_token>);
  24
  25 int main(int, char**) {
  26   {
  27     std::stop_token st1;
  28
  29     std::stop_source source;
  30     auto st2 = source.get_token();
  31
  32     assert(st1 != st2);
  33
  34     source.request_stop();
  35
  36     assert(!st1.stop_requested());
  37     assert(st2.stop_requested());
  38
  39     std::same_as<std::stop_token&> decltype(auto) ref = st1 = std::move(st2);
  40     assert(&ref == &st1);
  41
  42     assert(st1 != st2);
  43     assert(st1.stop_requested());
  44     assert(!st2.stop_requested());
  45   }
  46
  47   return 0;
  48 }