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
g(int)32 int g(int) {return 0;}
33
main(int,char **)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