//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: libcpp-has-no-threads
// UNSUPPORTED: c++98, c++03

// <future>

// class packaged_task<R(ArgTypes...)>

// packaged_task();

#include <future>
#include <cassert>

struct A {};

int main(int, char**)
{
    std::packaged_task<A(int, char)> p;
    assert(!p.valid());

  return 0;
}