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 promise<R>
15 
16 // void promise::set_value(R&& r);
17 
18 #include <future>
19 #include <memory>
20 #include <cassert>
21 
22 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
23 
24 struct A
25 {
AA26     A() {}
27     A(const A&) = delete;
AA28     A(A&&) {throw 9;}
29 };
30 
31 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
32 
main()33 int main()
34 {
35 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
36     {
37         typedef std::unique_ptr<int> T;
38         T i(new int(3));
39         std::promise<T> p;
40         std::future<T> f = p.get_future();
41         p.set_value(std::move(i));
42         assert(*f.get() == 3);
43         try
44         {
45             p.set_value(std::move(i));
46             assert(false);
47         }
48         catch (const std::future_error& e)
49         {
50             assert(e.code() == make_error_code(std::future_errc::promise_already_satisfied));
51         }
52     }
53     {
54         typedef A T;
55         T i;
56         std::promise<T> p;
57         std::future<T> f = p.get_future();
58         try
59         {
60             p.set_value(std::move(i));
61             assert(false);
62         }
63         catch (int j)
64         {
65             assert(j == 9);
66         }
67     }
68 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
69 }
70