1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // UNSUPPORTED: libcpp-has-no-threads
10 // UNSUPPORTED: c++03
11 
12 // <future>
13 
14 // class packaged_task<R(ArgTypes...)>
15 
16 // packaged_task();
17 
18 #include <future>
19 #include <cassert>
20 
21 #include "test_macros.h"
22 
23 struct A {};
24 
25 int main(int, char**)
26 {
27     std::packaged_task<A(int, char)> p;
28     assert(!p.valid());
29 
30   return 0;
31 }
32