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 | // template <MoveConstructible R, MoveConstructible ... ArgTypes> |
16 | // bool operator==(const function<R(ArgTypes...)>&, nullptr_t); |
17 | // |
18 | // template <MoveConstructible R, MoveConstructible ... ArgTypes> |
19 | // bool operator==(nullptr_t, const function<R(ArgTypes...)>&); |
20 | // |
21 | // template <MoveConstructible R, MoveConstructible ... ArgTypes> |
22 | // bool operator!=(const function<R(ArgTypes...)>&, nullptr_t); |
23 | // |
24 | // template <MoveConstructible R, MoveConstructible ... ArgTypes> |
25 | // bool operator!=(nullptr_t, const function<R(ArgTypes...)>&); |
26 | |
27 | #include <functional> |
28 | #include <cassert> |
29 | |
30 | #include "test_macros.h" |
31 | |
32 | int g(int) {return 0;} |
33 | |
34 | int main(int, char**) |
35 | { |
36 | { |
37 | std::function<int(int)> f; |
38 | assert(f == nullptr); |
39 | assert(nullptr == f); |
40 | f = g; |
41 | assert(f != nullptr); |
42 | assert(nullptr != f); |
43 | } |
44 | |
45 | return 0; |
46 | } |
47 | |