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// promise();
17
18#include <future>
19#include <cassert>
20
21int main()
22{
23    {
24        std::promise<int> p;
25        std::future<int> f = p.get_future();
26        assert(f.valid());
27    }
28    {
29        std::promise<int&> p;
30        std::future<int&> f = p.get_future();
31        assert(f.valid());
32    }
33    {
34        std::promise<void> p;
35        std::future<void> f = p.get_future();
36        assert(f.valid());
37    }
38}
39