xref: /freebsd-src/contrib/llvm-project/libcxx/include/__functional/unary_negate.h (revision 0fca6ea1d4eea4c934cfff25ac9ee8ad6fe95583)
1fe6060f1SDimitry Andric // -*- C++ -*-
2fe6060f1SDimitry Andric //===----------------------------------------------------------------------===//
3fe6060f1SDimitry Andric //
4fe6060f1SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5fe6060f1SDimitry Andric // See https://llvm.org/LICENSE.txt for license information.
6fe6060f1SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7fe6060f1SDimitry Andric //
8fe6060f1SDimitry Andric //===----------------------------------------------------------------------===//
9fe6060f1SDimitry Andric 
10fe6060f1SDimitry Andric #ifndef _LIBCPP___FUNCTIONAL_UNARY_NEGATE_H
11fe6060f1SDimitry Andric #define _LIBCPP___FUNCTIONAL_UNARY_NEGATE_H
12fe6060f1SDimitry Andric 
13fe6060f1SDimitry Andric #include <__config>
14fe6060f1SDimitry Andric #include <__functional/unary_function.h>
15fe6060f1SDimitry Andric 
16fe6060f1SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
17fe6060f1SDimitry Andric #  pragma GCC system_header
18fe6060f1SDimitry Andric #endif
19fe6060f1SDimitry Andric 
20fe6060f1SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD
21fe6060f1SDimitry Andric 
22fe6060f1SDimitry Andric #if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS)
23fe6060f1SDimitry Andric 
24fe6060f1SDimitry Andric template <class _Predicate>
25*0fca6ea1SDimitry Andric class _LIBCPP_TEMPLATE_VIS
26*0fca6ea1SDimitry Andric _LIBCPP_DEPRECATED_IN_CXX17 unary_negate : public __unary_function<typename _Predicate::argument_type, bool> {
27fe6060f1SDimitry Andric   _Predicate __pred_;
28cb14a3feSDimitry Andric 
29fe6060f1SDimitry Andric public:
30cb14a3feSDimitry Andric   _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI explicit unary_negate(const _Predicate& __pred)
31fe6060f1SDimitry Andric       : __pred_(__pred) {}
32cb14a3feSDimitry Andric   _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI bool
33cb14a3feSDimitry Andric   operator()(const typename _Predicate::argument_type& __x) const {
34cb14a3feSDimitry Andric     return !__pred_(__x);
35cb14a3feSDimitry Andric   }
36fe6060f1SDimitry Andric };
37fe6060f1SDimitry Andric 
38fe6060f1SDimitry Andric template <class _Predicate>
39cb14a3feSDimitry Andric _LIBCPP_DEPRECATED_IN_CXX17 inline _LIBCPP_CONSTEXPR_SINCE_CXX14 _LIBCPP_HIDE_FROM_ABI unary_negate<_Predicate>
40cb14a3feSDimitry Andric not1(const _Predicate& __pred) {
41cb14a3feSDimitry Andric   return unary_negate<_Predicate>(__pred);
42cb14a3feSDimitry Andric }
43fe6060f1SDimitry Andric 
44fe6060f1SDimitry Andric #endif // _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS)
45fe6060f1SDimitry Andric 
46fe6060f1SDimitry Andric _LIBCPP_END_NAMESPACE_STD
47fe6060f1SDimitry Andric 
48fe6060f1SDimitry Andric #endif // _LIBCPP___FUNCTIONAL_UNARY_NEGATE_H
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