55 lines · c
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_DEFAULT_SEARCHER_H11#define _LIBCPP___FUNCTIONAL_DEFAULT_SEARCHER_H12 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_header22#endif23 24_LIBCPP_BEGIN_NAMESPACE_STD25 26#if _LIBCPP_STD_VER >= 1727 28// default searcher29template <class _ForwardIterator, class _BinaryPredicate = equal_to<>>30class default_searcher {31public:32 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX2033 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 43private:44 _ForwardIterator __first_;45 _ForwardIterator __last_;46 _BinaryPredicate __pred_;47};48_LIBCPP_CTAD_SUPPORTED_FOR_TYPE(default_searcher);49 50#endif // _LIBCPP_STD_VER >= 1751 52_LIBCPP_END_NAMESPACE_STD53 54#endif // _LIBCPP___FUNCTIONAL_DEFAULT_SEARCHER_H55