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 promise<R>
13
14// promise();
15
16#include <future>
17#include <cassert>
18
19int main()
20{
21    {
22        std::promise<int> p;
23        std::future<int> f = p.get_future();
24        assert(f.valid());
25    }
26    {
27        std::promise<int&> p;
28        std::future<int&> f = p.get_future();
29        assert(f.valid());
30    }
31    {
32        std::promise<void> p;
33        std::future<void> f = p.get_future();
34        assert(f.valid());
35    }
36}
37