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(const R& r);
17 
18 #include <future>
19 #include <cassert>
20 
func(std::promise<int> p)21 void func(std::promise<int> p)
22 {
23     const int i = 5;
24     p.set_value_at_thread_exit(i);
25 }
26 
main()27 int main()
28 {
29     {
30         std::promise<int> p;
31         std::future<int> f = p.get_future();
32         std::thread(func, std::move(p)).detach();
33         assert(f.get() == 5);
34     }
35 }
36