libcxx/include/__functional/default_searcher.h

   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/operations.h>
  16 #include <__iterator/iterator_traits.h>
  17 #include <utility>
  18
  19 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  20 #pragma GCC system_header
  21 #endif
  22
  23 _LIBCPP_BEGIN_NAMESPACE_STD
  24
  25 #if _LIBCPP_STD_VER > 14
  26
  27 // default searcher
  28 template<class _ForwardIterator, class _BinaryPredicate = equal_to<>>
  29 class _LIBCPP_TEMPLATE_VIS default_searcher {
  30 public:
  31     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
  32     default_searcher(_ForwardIterator __f, _ForwardIterator __l,
  33                        _BinaryPredicate __p = _BinaryPredicate())
  34         : __first_(__f), __last_(__l), __pred_(__p) {}
  35
  36     template <typename _ForwardIterator2>
  37     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
  38     pair<_ForwardIterator2, _ForwardIterator2>
  39     operator () (_ForwardIterator2 __f, _ForwardIterator2 __l) const
  40     {
  41         return _VSTD::__search(__f, __l, __first_, __last_, __pred_,
  42             typename iterator_traits<_ForwardIterator>::iterator_category(),
  43             typename iterator_traits<_ForwardIterator2>::iterator_category());
  44     }
  45
  46 private:
  47     _ForwardIterator __first_;
  48     _ForwardIterator __last_;
  49     _BinaryPredicate __pred_;
  50     };
  51
  52 #endif // _LIBCPP_STD_VER > 14
  53
  54 _LIBCPP_END_NAMESPACE_STD
  55
  56 #endif // _LIBCPP___FUNCTIONAL_DEFAULT_SEARCHER_H