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_DEFAULT_SEARCHER_H 11 #define _LIBCPP___FUNCTIONAL_DEFAULT_SEARCHER_H 12 13 #include <__algorithm/search.h> 14 #include <__config> 15 #include <__functional/identity.h> 16 #include <__functional/operations.h> 17 #include <__iterator/iterator_traits.h> 18 #include <__utility/pair.h> 19 20 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 21 # pragma GCC system_header 22 #endif 23 24 _LIBCPP_BEGIN_NAMESPACE_STD 25 26 #if _LIBCPP_STD_VER >= 17 27 28 // default searcher 29 template <class _ForwardIterator, class _BinaryPredicate = equal_to<>> 30 class _LIBCPP_TEMPLATE_VIS default_searcher { 31 public: 32 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 33 default_searcher(_ForwardIterator __f, _ForwardIterator __l, _BinaryPredicate __p = _BinaryPredicate()) 34 : __first_(__f), __last_(__l), __pred_(__p) {} 35 36 template <typename _ForwardIterator2> 37 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 pair<_ForwardIterator2, _ForwardIterator2> 38 operator()(_ForwardIterator2 __f, _ForwardIterator2 __l) const { 39 auto __proj = __identity(); 40 return std::__search_impl(__f, __l, __first_, __last_, __pred_, __proj, __proj); 41 } 42 43 private: 44 _ForwardIterator __first_; 45 _ForwardIterator __last_; 46 _BinaryPredicate __pred_; 47 }; 48 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(default_searcher); 49 50 #endif // _LIBCPP_STD_VER >= 17 51 52 _LIBCPP_END_NAMESPACE_STD 53 54 #endif // _LIBCPP___FUNCTIONAL_DEFAULT_SEARCHER_H 55