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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_UNARY_NEGATE_H11#define _LIBCPP___FUNCTIONAL_UNARY_NEGATE_H12 13#include <__config>14#include <__functional/unary_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 unary_negate : public __unary_function<typename _Predicate::argument_type, bool> {26 _Predicate __pred_;27 28public:29 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI explicit unary_negate(const _Predicate& __pred)30 : __pred_(__pred) {}31 _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool32 operator()(const typename _Predicate::argument_type& __x) const {33 return !__pred_(__x);34 }35};36 37template <class _Predicate>38_LIBCPP_DEPRECATED_IN_CXX17 inline _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI unary_negate<_Predicate>39not1(const _Predicate& __pred) {40 return unary_negate<_Predicate>(__pred);41}42 43#endif // _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS)44 45_LIBCPP_END_NAMESPACE_STD46 47#endif // _LIBCPP___FUNCTIONAL_UNARY_NEGATE_H48