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
11 
12 // <future>
13 
14 // class packaged_task<R(ArgTypes...)>
15 
16 // packaged_task& operator=(packaged_task&& other);
17 
18 #include <future>
19 #include <cassert>
20 
21 #include "test_macros.h"
22 
23 class A
24 {
25     long data_;
26 
27 public:
28     explicit A(long i) : data_(i) {}
29 
30     long operator()(long i, long j) const {return data_ + i + j;}
31 };
32 
33 int main(int, char**)
34 {
35     {
36         std::packaged_task<double(int, char)> p0(A(5));
37         std::packaged_task<double(int, char)> p;
38         p = std::move(p0);
39         assert(!p0.valid());
40         assert(p.valid());
41         std::future<double> f = p.get_future();
42         p(3, 97);
43         assert(f.get() == 105.0);
44     }
45     {
46         std::packaged_task<double(int, char)> p0;
47         std::packaged_task<double(int, char)> p;
48         p = std::move(p0);
49         assert(!p0.valid());
50         assert(!p.valid());
51     }
52 
53   return 0;
54 }
55