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: c++03
10
11// <functional>
12
13// class function<R(ArgTypes...)>
14
15// function();
16
17#include <functional>
18#include <cassert>
19
20#include "test_macros.h"
21
22int main(int, char**)
23{
24 std::function<int(int)> f;
25 assert(!f);
26
27 return 0;
28}
29

source code of libcxx/test/std/utilities/function.objects/func.wrap/func.wrap.func/func.wrap.func.con/default.pass.cpp