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: libcpp-has-no-experimental-stop_token
  11 // UNSUPPORTED: c++03, c++11, c++14, c++17
  12 // XFAIL: availability-synchronization_library-missing
  13
  14 // stop_token& operator=(stop_token&& rhs) noexcept;
  15
  16 #include <cassert>
  17 #include <concepts>
  18 #include <stop_token>
  19 #include <type_traits>
  20 #include <utility>
  21
  22 #include "test_macros.h"
  23
  24 static_assert(std::is_nothrow_move_assignable_v<std::stop_token>);
  25
  26 int main(int, char**) {
  27   {
  28     std::stop_token st1;
  29
  30     std::stop_source source;
  31     auto st2 = source.get_token();
  32
  33     assert(st1 != st2);
  34
  35     source.request_stop();
  36
  37     assert(!st1.stop_requested());
  38     assert(st2.stop_requested());
  39
  40     std::same_as<std::stop_token&> decltype(auto) ref = st1 = std::move(st2);
  41     assert(&ref == &st1);
  42
  43     assert(st1 != st2);
  44     assert(st1.stop_requested());
  45     assert(!st2.stop_requested());
  46   }
  47
  48   return 0;
  49 }