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 // <functional>
10 
11 // not2
12 //  deprecated in C++17
13 
14 // UNSUPPORTED: clang-4.0
15 // UNSUPPORTED: c++03, c++11, c++14
16 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS
17 
18 #include <functional>
19 
20 #include "test_macros.h"
21 
22 struct Predicate {
23     typedef int first_argument_type;
24     typedef int second_argument_type;
25     bool operator()(first_argument_type, second_argument_type) const { return true; }
26 };
27 
28 int main(int, char**) {
29     std::not2(Predicate()); // expected-warning {{'not2<Predicate>' is deprecated}}
30 
31     return 0;
32 }
33