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___FUNCTIONAL_BINARY_NEGATE_H 11 #define _LIBCPP___FUNCTIONAL_BINARY_NEGATE_H 12 13 #include <__config> 14 #include <__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 22 #if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS) 23 24 template <class _Predicate> 25 class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 binary_negate 26 : public __binary_function<typename _Predicate::first_argument_type, 27 typename _Predicate::second_argument_type, 28 bool> { 29 _Predicate __pred_; 30 31 public: 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 41 template <class _Predicate> 42 _LIBCPP_DEPRECATED_IN_CXX17 inline _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI binary_negate<_Predicate> 43 not2(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_STD 50 51 #endif // _LIBCPP___FUNCTIONAL_BINARY_NEGATE_H 52