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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-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___FUNCTIONAL_BINARY_NEGATE_H11#define _LIBCPP___FUNCTIONAL_BINARY_NEGATE_H12 13#include <__config>14#include <__functional/binary_function.h>15 16#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)17# pragma GCC system_header18#endif19 20_LIBCPP_BEGIN_NAMESPACE_STD21 22#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS)23 24template <class _Predicate>25class _LIBCPP_DEPRECATED_IN_CXX17 binary_negate26 : public __binary_function<typename _Predicate::first_argument_type,27 typename _Predicate::second_argument_type,28 bool> {29 _Predicate __pred_;30 31public:32 _LIBCPP_HIDE_FROM_ABI explicit _LIBCPP_CONSTEXPR_SINCE_CXX14 binary_negate(const _Predicate& __pred)33 : __pred_(__pred) {}34 35 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool operator()(36 const typename _Predicate::first_argument_type& __x, const typename _Predicate::second_argument_type& __y) const {37 return !__pred_(__x, __y);38 }39};40 41template <class _Predicate>42_LIBCPP_DEPRECATED_IN_CXX17 inline _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI binary_negate<_Predicate>43not2(const _Predicate& __pred) {44 return binary_negate<_Predicate>(__pred);45}46 47#endif // _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS)48 49_LIBCPP_END_NAMESPACE_STD50 51#endif // _LIBCPP___FUNCTIONAL_BINARY_NEGATE_H52