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 packaged_task<R(ArgTypes...)>
15
16// packaged_task();
17
18#include <future>
19#include <cassert>
20
21struct A {};
22
23int main()
24{
25    std::packaged_task<A(int, char)> p;
26    assert(!p.valid());
27}
28