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 
12 // <future>
13 
14 // class shared_future<R>
15 
16 // shared_future(shared_future&& rhs);
17 
18 #include <future>
19 #include <cassert>
20 
main()21 int main()
22 {
23     {
24         typedef int T;
25         std::promise<T> p;
26         std::shared_future<T> f0 = p.get_future();
27         std::shared_future<T> f = std::move(f0);
28         assert(!f0.valid());
29         assert(f.valid());
30     }
31     {
32         typedef int T;
33         std::shared_future<T> f0;
34         std::shared_future<T> f = std::move(f0);
35         assert(!f0.valid());
36         assert(!f.valid());
37     }
38     {
39         typedef int& T;
40         std::promise<T> p;
41         std::shared_future<T> f0 = p.get_future();
42         std::shared_future<T> f = std::move(f0);
43         assert(!f0.valid());
44         assert(f.valid());
45     }
46     {
47         typedef int& T;
48         std::shared_future<T> f0;
49         std::shared_future<T> f = std::move(f0);
50         assert(!f0.valid());
51         assert(!f.valid());
52     }
53     {
54         typedef void T;
55         std::promise<T> p;
56         std::shared_future<T> f0 = p.get_future();
57         std::shared_future<T> f = std::move(f0);
58         assert(!f0.valid());
59         assert(f.valid());
60     }
61     {
62         typedef void T;
63         std::shared_future<T> f0;
64         std::shared_future<T> f = std::move(f0);
65         assert(!f0.valid());
66         assert(!f.valid());
67     }
68 }
69