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 36 namespace ranges { 37 namespace __is_heap { 38 39 struct __fn { 40 template <class _Iter, class _Sent, class _Proj, class _Comp> 41 _LIBCPP_HIDE_FROM_ABI constexpr static bool __is_heap_fn_impl__fn42 __is_heap_fn_impl(_Iter __first, _Sent __last, _Comp& __comp, _Proj& __proj) { 43 auto __last_iter = ranges::next(__first, __last); 44 auto&& __projected_comp = std::__make_projected(__comp, __proj); 45 46 auto __result = std::__is_heap_until(std::move(__first), std::move(__last_iter), __projected_comp); 47 return __result == __last; 48 } 49 50 template <random_access_iterator _Iter, 51 sentinel_for<_Iter> _Sent, 52 class _Proj = identity, 53 indirect_strict_weak_order<projected<_Iter, _Proj>> _Comp = ranges::less> 54 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool operator__fn55 operator()(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const { 56 return __is_heap_fn_impl(std::move(__first), std::move(__last), __comp, __proj); 57 } 58 59 template <random_access_range _Range, 60 class _Proj = identity, 61 indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>> _Comp = ranges::less> 62 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool operator__fn63 operator()(_Range&& __range, _Comp __comp = {}, _Proj __proj = {}) const { 64 return __is_heap_fn_impl(ranges::begin(__range), ranges::end(__range), __comp, __proj); 65 } 66 }; 67 68 } // namespace __is_heap 69 70 inline namespace __cpo { 71 inline constexpr auto is_heap = __is_heap::__fn{}; 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_IS_HEAP_H 82