libcxx/test/std/thread/futures/futures.future_error/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
  11
  12 // <future>
  13
  14 // class future_error
  15 //
  16 // explicit future_error(future_errc e); // since C++17
  17
  18 #include <cassert>
  19 #include <future>
  20 #include <type_traits>
  21
  22 int main(int, char**) {
  23   {
  24     std::future_error f(std::future_errc::broken_promise);
  25     assert(f.code() == std::make_error_code(std::future_errc::broken_promise));
  26   }
  27   {
  28     std::future_error f(std::future_errc::future_already_retrieved);
  29     assert(f.code() == std::make_error_code(std::future_errc::future_already_retrieved));
  30   }
  31   {
  32     std::future_error f(std::future_errc::promise_already_satisfied);
  33     assert(f.code() == std::make_error_code(std::future_errc::promise_already_satisfied));
  34   }
  35   {
  36     std::future_error f(std::future_errc::no_state);
  37     assert(f.code() == std::make_error_code(std::future_errc::no_state));
  38   }
  39
  40   // Make sure the constructor is explicit
  41   static_assert(!std::is_convertible_v<std::future_errc, std::future_error>);
  42
  43   return 0;
  44 }