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_IS_HEAP_H
10#define _LIBCPP___ALGORITHM_RANGES_IS_HEAP_H
11
12#include <__algorithm/is_heap_until.h>
13#include <__algorithm/make_projected.h>
14#include <__config>
15#include <__functional/identity.h>
16#include <__functional/ranges_operations.h>
17#include <__iterator/concepts.h>
18#include <__iterator/iterator_traits.h>
19#include <__iterator/next.h>
20#include <__iterator/projected.h>
21#include <__ranges/access.h>
22#include <__ranges/concepts.h>
23#include <__utility/move.h>
24
25#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
26# pragma GCC system_header
27#endif
28
29_LIBCPP_PUSH_MACROS
30#include <__undef_macros>
31
32#if _LIBCPP_STD_VER >= 20
33
34_LIBCPP_BEGIN_NAMESPACE_STD
35
36namespace ranges {
37struct __is_heap {
38 template <class _Iter, class _Sent, class _Proj, class _Comp>
39 constexpr static bool __is_heap_fn_impl(_Iter __first, _Sent __last, _Comp& __comp, _Proj& __proj) {
40 auto __last_iter = ranges::next(__first, __last);
41 auto&& __projected_comp = std::__make_projected(__comp, __proj);
42
43 auto __result = std::__is_heap_until(std::move(__first), std::move(__last_iter), __projected_comp);
44 return __result == __last;
45 }
46
47 template <random_access_iterator _Iter,
48 sentinel_for<_Iter> _Sent,
49 class _Proj = identity,
50 indirect_strict_weak_order<projected<_Iter, _Proj>> _Comp = ranges::less>
51 [[nodiscard]] constexpr bool operator()(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const {
52 return __is_heap_fn_impl(std::move(__first), std::move(__last), __comp, __proj);
53 }
54
55 template <random_access_range _Range,
56 class _Proj = identity,
57 indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>> _Comp = ranges::less>
58 [[nodiscard]] constexpr bool operator()(_Range&& __range, _Comp __comp = {}, _Proj __proj = {}) const {
59 return __is_heap_fn_impl(ranges::begin(__range), ranges::end(__range), __comp, __proj);
60 }
61};
62
63inline namespace __cpo {
64inline constexpr auto is_heap = __is_heap{};
65} // namespace __cpo
66} // namespace ranges
67
68_LIBCPP_END_NAMESPACE_STD
69
70#endif // _LIBCPP_STD_VER >= 20
71
72_LIBCPP_POP_MACROS
73
74#endif // _LIBCPP___ALGORITHM_RANGES_IS_HEAP_H
75