libcxx/include/__algorithm/ranges_make_heap.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_MAKE_HEAP_H
  10 #define _LIBCPP___ALGORITHM_RANGES_MAKE_HEAP_H
  11
  12 #include <__algorithm/iterator_operations.h>
  13 #include <__algorithm/make_heap.h>
  14 #include <__algorithm/make_projected.h>
  15 #include <__concepts/same_as.h>
  16 #include <__config>
  17 #include <__functional/identity.h>
  18 #include <__functional/invoke.h>
  19 #include <__functional/ranges_operations.h>
  20 #include <__iterator/concepts.h>
  21 #include <__iterator/iterator_traits.h>
  22 #include <__iterator/next.h>
  23 #include <__iterator/projected.h>
  24 #include <__iterator/sortable.h>
  25 #include <__ranges/access.h>
  26 #include <__ranges/concepts.h>
  27 #include <__ranges/dangling.h>
  28 #include <__utility/forward.h>
  29 #include <__utility/move.h>
  30
  31 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  32 #  pragma GCC system_header
  33 #endif
  34
  35 _LIBCPP_PUSH_MACROS
  36 #include <__undef_macros>
  37
  38 #if _LIBCPP_STD_VER >= 20
  39
  40 _LIBCPP_BEGIN_NAMESPACE_STD
  41
  42 namespace ranges {
  43 struct __make_heap {
  44   template <class _Iter, class _Sent, class _Comp, class _Proj>
  45   _LIBCPP_HIDE_FROM_ABI constexpr static _Iter
  46   __make_heap_fn_impl(_Iter __first, _Sent __last, _Comp& __comp, _Proj& __proj) {
  47     auto __last_iter = ranges::next(__first, __last);
  48
  49     auto&& __projected_comp = std::__make_projected(__comp, __proj);
  50     std::__make_heap<_RangeAlgPolicy>(std::move(__first), __last_iter, __projected_comp);
  51
  52     return __last_iter;
  53   }
  54
  55   template <random_access_iterator _Iter, sentinel_for<_Iter> _Sent, class _Comp = ranges::less, class _Proj = identity>
  56     requires sortable<_Iter, _Comp, _Proj>
  57   _LIBCPP_HIDE_FROM_ABI constexpr _Iter
  58   operator()(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const {
  59     return __make_heap_fn_impl(std::move(__first), std::move(__last), __comp, __proj);
  60   }
  61
  62   template <random_access_range _Range, class _Comp = ranges::less, class _Proj = identity>
  63     requires sortable<iterator_t<_Range>, _Comp, _Proj>
  64   _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Range>
  65   operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const {
  66     return __make_heap_fn_impl(ranges::begin(__r), ranges::end(__r), __comp, __proj);
  67   }
  68 };
  69
  70 inline namespace __cpo {
  71 inline constexpr auto make_heap = __make_heap{};
  72 } // namespace __cpo
  73 } // namespace ranges
  74
  75 _LIBCPP_END_NAMESPACE_STD
  76
  77 #endif // _LIBCPP_STD_VER >= 20
  78
  79 _LIBCPP_POP_MACROS
  80
  81 #endif // _LIBCPP___ALGORITHM_RANGES_MAKE_HEAP_H