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_at_thread_exit(R&& r);
17 
18 #include <future>
19 #include <memory>
20 #include <cassert>
21 
22 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
23 
func(std::promise<std::unique_ptr<int>> p)24 void func(std::promise<std::unique_ptr<int>> p)
25 {
26     p.set_value_at_thread_exit(std::unique_ptr<int>(new int(5)));
27 }
28 
29 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
30 
main()31 int main()
32 {
33 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
34     {
35         std::promise<std::unique_ptr<int>> p;
36         std::future<std::unique_ptr<int>> f = p.get_future();
37         std::thread(func, std::move(p)).detach();
38         assert(*f.get() == 5);
39     }
40 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
41 }
42