libcxx/include/__algorithm/ranges_adjacent_find.h

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef _LIBCPP___ALGORITHM_RANGES_ADJACENT_FIND_H
  10 #define _LIBCPP___ALGORITHM_RANGES_ADJACENT_FIND_H
  11
  12 #include <__algorithm/adjacent_find.h>
  13 #include <__config>
  14 #include <__functional/identity.h>
  15 #include <__functional/ranges_operations.h>
  16 #include <__iterator/concepts.h>
  17 #include <__iterator/projected.h>
  18 #include <__ranges/access.h>
  19 #include <__ranges/concepts.h>
  20 #include <__ranges/dangling.h>
  21 #include <__utility/move.h>
  22
  23 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  24 #  pragma GCC system_header
  25 #endif
  26
  27 _LIBCPP_PUSH_MACROS
  28 #include <__undef_macros>
  29
  30 #if _LIBCPP_STD_VER >= 20
  31
  32 _LIBCPP_BEGIN_NAMESPACE_STD
  33
  34 namespace ranges {
  35 struct __adjacent_find {
  36   template <forward_iterator _Iter,
  37             sentinel_for<_Iter> _Sent,
  38             class _Proj                                                                       = identity,
  39             indirect_binary_predicate<projected<_Iter, _Proj>, projected<_Iter, _Proj>> _Pred = ranges::equal_to>
  40   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr _Iter
  41   operator()(_Iter __first, _Sent __last, _Pred __pred = {}, _Proj __proj = {}) const {
  42     return std::__adjacent_find(std::move(__first), std::move(__last), __pred, __proj);
  43   }
  44
  45   template <forward_range _Range,
  46             class _Proj = identity,
  47             indirect_binary_predicate<projected<iterator_t<_Range>, _Proj>, projected<iterator_t<_Range>, _Proj>>
  48                 _Pred = ranges::equal_to>
  49   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Range>
  50   operator()(_Range&& __range, _Pred __pred = {}, _Proj __proj = {}) const {
  51     return std::__adjacent_find(ranges::begin(__range), ranges::end(__range), __pred, __proj);
  52   }
  53 };
  54
  55 inline namespace __cpo {
  56 inline constexpr auto adjacent_find = __adjacent_find{};
  57 } // namespace __cpo
  58 } // namespace ranges
  59
  60 _LIBCPP_END_NAMESPACE_STD
  61
  62 #endif // _LIBCPP_STD_VER >= 20
  63
  64 _LIBCPP_POP_MACROS
  65
  66 #endif // _LIBCPP___ALGORITHM_RANGES_ADJACENT_FIND_H