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// <future>
11
12// class future<R>
13
14// shared_future<R> share() &&;
15
16#include <future>
17#include <cassert>
18
19int main()
20{
21    {
22        typedef int T;
23        std::promise<T> p;
24        std::future<T> f0 = p.get_future();
25        std::shared_future<T> f = std::move(f0.share());
26        assert(!f0.valid());
27        assert(f.valid());
28    }
29    {
30        typedef int T;
31        std::future<T> f0;
32        std::shared_future<T> f = std::move(f0.share());
33        assert(!f0.valid());
34        assert(!f.valid());
35    }
36    {
37        typedef int& T;
38        std::promise<T> p;
39        std::future<T> f0 = p.get_future();
40        std::shared_future<T> f = std::move(f0.share());
41        assert(!f0.valid());
42        assert(f.valid());
43    }
44    {
45        typedef int& T;
46        std::future<T> f0;
47        std::shared_future<T> f = std::move(f0.share());
48        assert(!f0.valid());
49        assert(!f.valid());
50    }
51    {
52        typedef void T;
53        std::promise<T> p;
54        std::future<T> f0 = p.get_future();
55        std::shared_future<T> f = std::move(f0.share());
56        assert(!f0.valid());
57        assert(f.valid());
58    }
59    {
60        typedef void T;
61        std::future<T> f0;
62        std::shared_future<T> f = std::move(f0.share());
63        assert(!f0.valid());
64        assert(!f.valid());
65    }
66}
67