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// <functional>
11
12// class function<R(ArgTypes...)>
13
14// explicit function();
15
16#include <functional>
17#include <cassert>
18
19int main()
20{
21    std::function<int(int)> f;
22    assert(!f);
23}
24