libcxx/test/std/thread/thread.stoptoken/stopcallback/ctad.compile.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 //   template<class Callback>
  14 //   stop_callback(stop_token, Callback) -> stop_callback<Callback>;
  15
  16 #include <stop_token>
  17 #include <type_traits>
  18 #include <utility>
  19
  20 void test() {
  21   std::stop_token st;
  22   auto a = [] {};
  23   static_assert(std::is_same_v<decltype(std::stop_callback(st, a)), std::stop_callback<decltype(a)>>);
  24   static_assert(std::is_same_v<decltype(std::stop_callback(st, std::as_const(a))), std::stop_callback<decltype(a)>>);
  25   static_assert(std::is_same_v<decltype(std::stop_callback(st, std::move(a))), std::stop_callback<decltype(a)>>);
  26   static_assert(
  27       std::is_same_v<decltype(std::stop_callback(st, std::move(std::as_const(a)))), std::stop_callback<decltype(a)>>);
  28 }