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 // unary_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 argument_type;
operator ()Predicate21 bool operator()(argument_type) const { return true; }
22 };
23
test()24 void test() {
25 std::unary_negate<Predicate> f((Predicate())); // expected-warning {{'unary_negate<Predicate>' is deprecated}}
26 (void)f;
27 }
28