libcxx/test/std/thread/futures/futures.promise/set_rvalue.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: c++03
  10 // UNSUPPORTED: no-threads, no-exceptions
  11
  12 // <future>
  13
  14 // class promise<R>
  15
  16 // void promise::set_value(R&& r);
  17
  18 #include <future>
  19 #include <memory>
  20 #include <cassert>
  21
  22 #include "test_macros.h"
  23
  24 struct A
  25 {
  26     A() {}
  27     A(const A&) = delete;
  28     A(A&&) {throw 9;}
  29 };
  30
  31 int main(int, char**)
  32 {
  33     {
  34         typedef std::unique_ptr<int> T;
  35         T i(new int(3));
  36         std::promise<T> p;
  37         std::future<T> f = p.get_future();
  38         p.set_value(std::move(i));
  39         assert(*f.get() == 3);
  40         try
  41         {
  42             p.set_value(std::move(i));
  43             assert(false);
  44         }
  45         catch (const std::future_error& e)
  46         {
  47             assert(e.code() == make_error_code(std::future_errc::promise_already_satisfied));
  48         }
  49     }
  50     {
  51         typedef A T;
  52         T i;
  53         std::promise<T> p;
  54         std::future<T> f = p.get_future();
  55         try
  56         {
  57             p.set_value(std::move(i));
  58             assert(false);
  59         }
  60         catch (int j)
  61         {
  62             assert(j == 9);
  63         }
  64     }
  65
  66   return 0;
  67 }