libcxx/test/std/thread/futures/futures.task/futures.task.members/ctad.static.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, c++20
  11
  12 // checks that CTAD for std::packaged_task works properly with static operator() overloads
  13
  14 #include <future>
  15 #include <type_traits>
  16
  17 struct Except {
  18   static int operator()(int*, long*) { return 0; }
  19 };
  20 static_assert(std::is_same_v<decltype(std::packaged_task{Except{}}), std::packaged_task<int(int*, long*)>>);
  21
  22 struct Noexcept {
  23   static int operator()(int*, long*) noexcept { return 0; }
  24 };
  25 static_assert(std::is_same_v<decltype(std::packaged_task{Noexcept{}}), std::packaged_task<int(int*, long*)>>);