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1// -*- C++ -*-
2//===----------------------------------------------------------------------===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef _LIBCPP___CXX03___FUNCTIONAL_BINARY_NEGATE_H
11#define _LIBCPP___CXX03___FUNCTIONAL_BINARY_NEGATE_H
12
13#include <__cxx03/__config>
14#include <__cxx03/__functional/binary_function.h>
15
16#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
17# pragma GCC system_header
18#endif
19
20_LIBCPP_BEGIN_NAMESPACE_STD
21
22template <class _Predicate>
23class _LIBCPP_TEMPLATE_VIS binary_negate
24 : public __binary_function<typename _Predicate::first_argument_type,
25 typename _Predicate::second_argument_type,
26 bool> {
27 _Predicate __pred_;
28
29public:
30 _LIBCPP_HIDE_FROM_ABI explicit binary_negate(const _Predicate& __pred) : __pred_(__pred) {}
31
32 _LIBCPP_HIDE_FROM_ABI bool operator()(const typename _Predicate::first_argument_type& __x,
33 const typename _Predicate::second_argument_type& __y) const {
34 return !__pred_(__x, __y);
35 }
36};
37
38template <class _Predicate>
39inline _LIBCPP_HIDE_FROM_ABI binary_negate<_Predicate> not2(const _Predicate& __pred) {
40 return binary_negate<_Predicate>(__pred);
41}
42
43_LIBCPP_END_NAMESPACE_STD
44
45#endif // _LIBCPP___CXX03___FUNCTIONAL_BINARY_NEGATE_H
46

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source code of libcxx/include/__cxx03/__functional/binary_negate.h