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_UNARY_NEGATE_H 11 #define _LIBCPP___FUNCTIONAL_UNARY_NEGATE_H 12 13 #include <__config> 14 #include <__functional/unary_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 unary_negate 26 : public unary_function<typename _Predicate::argument_type, bool> 27 { 28 _Predicate __pred_; 29 public: 30 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 31 explicit unary_negate(const _Predicate& __pred) 32 : __pred_(__pred) {} 33 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 34 bool operator()(const typename _Predicate::argument_type& __x) const 35 {return !__pred_(__x);} 36 }; 37 38 template <class _Predicate> 39 _LIBCPP_DEPRECATED_IN_CXX17 inline _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 40 unary_negate<_Predicate> 41 not1(const _Predicate& __pred) {return unary_negate<_Predicate>(__pred);} 42 43 #endif // _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS) 44 45 _LIBCPP_END_NAMESPACE_STD 46 47 #endif // _LIBCPP___FUNCTIONAL_UNARY_NEGATE_H 48