test/std/thread/futures/futures.task/futures.task.members/ctor_move.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is dual licensed under the MIT and the University of Illinois Open
   6 // Source Licenses. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // UNSUPPORTED: libcpp-has-no-threads
  11 // UNSUPPORTED: c++98, c++03
  12
  13 // <future>
  14
  15 // class packaged_task<R(ArgTypes...)>
  16
  17 // packaged_task(packaged_task&& other);
  18
  19 #include <future>
  20 #include <cassert>
  21
  22 class A
  23 {
  24     long data_;
  25
  26 public:
  27     explicit A(long i) : data_(i) {}
  28
  29     long operator()(long i, long j) const {return data_ + i + j;}
  30 };
  31
  32 int main()
  33 {
  34     {
  35         std::packaged_task<double(int, char)> p0(A(5));
  36         std::packaged_task<double(int, char)> p = std::move(p0);
  37         assert(!p0.valid());
  38         assert(p.valid());
  39         std::future<double> f = p.get_future();
  40         p(3, 'a');
  41         assert(f.get() == 105.0);
  42     }
  43     {
  44         std::packaged_task<double(int, char)> p0;
  45         std::packaged_task<double(int, char)> p = std::move(p0);
  46         assert(!p0.valid());
  47         assert(!p.valid());
  48     }
  49 }