1bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===//
2bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//
3f5256e16dfc425c1d466f6308d4026d529ce9e0bHoward Hinnant//                     The LLVM Compiler Infrastructure
4bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//
5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open
6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// Source Licenses. See LICENSE.TXT for details.
7bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//
8bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===//
9bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//
10bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// UNSUPPORTED: libcpp-has-no-threads
11bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
12bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// <future>
13bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
14bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// class shared_future<R>
15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
16bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// shared_future& operator=(const shared_future& rhs);
17bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
18bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <future>
19bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <cassert>
20bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
21bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint main()
22bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{
23bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
24bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant    {
25bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        typedef int T;
26bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        std::promise<T> p;
27bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        std::shared_future<T> f0 = p.get_future();
28bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        std::shared_future<T> f;
29bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        f = f0;
30bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(f0.valid());
31bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(f.valid());
32bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant    }
33bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant    {
34bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        typedef int T;
35bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        std::shared_future<T> f0;
36bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        std::shared_future<T> f;
37bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        f = f0;
38bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(!f0.valid());
39bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(!f.valid());
40bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant    }
41bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant    {
42bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        typedef int& T;
43bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        std::promise<T> p;
44        std::shared_future<T> f0 = p.get_future();
45        std::shared_future<T> f;
46        f = f0;
47        assert(f0.valid());
48        assert(f.valid());
49    }
50    {
51        typedef int& T;
52        std::shared_future<T> f0;
53        std::shared_future<T> f;
54        f = f0;
55        assert(!f0.valid());
56        assert(!f.valid());
57    }
58    {
59        typedef void T;
60        std::promise<T> p;
61        std::shared_future<T> f0 = p.get_future();
62        std::shared_future<T> f;
63        f = f0;
64        assert(f0.valid());
65        assert(f.valid());
66    }
67    {
68        typedef void T;
69        std::shared_future<T> f0;
70        std::shared_future<T> f;
71        f = f0;
72        assert(!f0.valid());
73        assert(!f.valid());
74    }
75#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
76}
77