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 // binary_negate
12 //  deprecated in C++17
13 
14 // UNSUPPORTED: c++03, c++11, c++14
15 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS
16 
17 #include <functional>
18 
19 struct Predicate {
20     typedef int first_argument_type;
21     typedef int second_argument_type;
operator ()Predicate22     bool operator()(first_argument_type, second_argument_type) const { return true; }
23 };
24 
test()25 void test() {
26     std::binary_negate<Predicate> f((Predicate())); // expected-warning {{'binary_negate<Predicate>' is deprecated}}
27     (void)f;
28 }
29