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 struct __is_heap { 38 template <class _Iter, class _Sent, class _Proj, class _Comp> 39 _LIBCPP_HIDE_FROM_ABI constexpr static bool 40 __is_heap_fn_impl(_Iter __first, _Sent __last, _Comp& __comp, _Proj& __proj) { 41 auto __last_iter = ranges::next(__first, __last); 42 auto&& __projected_comp = std::__make_projected(__comp, __proj); 43 44 auto __result = std::__is_heap_until(std::move(__first), std::move(__last_iter), __projected_comp); 45 return __result == __last; 46 } 47 48 template <random_access_iterator _Iter, 49 sentinel_for<_Iter> _Sent, 50 class _Proj = identity, 51 indirect_strict_weak_order<projected<_Iter, _Proj>> _Comp = ranges::less> 52 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool 53 operator()(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const { 54 return __is_heap_fn_impl(std::move(__first), std::move(__last), __comp, __proj); 55 } 56 57 template <random_access_range _Range, 58 class _Proj = identity, 59 indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>> _Comp = ranges::less> 60 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool 61 operator()(_Range&& __range, _Comp __comp = {}, _Proj __proj = {}) const { 62 return __is_heap_fn_impl(ranges::begin(__range), ranges::end(__range), __comp, __proj); 63 } 64 }; 65 66 inline namespace __cpo { 67 inline constexpr auto is_heap = __is_heap{}; 68 } // namespace __cpo 69 } // namespace ranges 70 71 _LIBCPP_END_NAMESPACE_STD 72 73 #endif // _LIBCPP_STD_VER >= 20 74 75 _LIBCPP_POP_MACROS 76 77 #endif // _LIBCPP___ALGORITHM_RANGES_IS_HEAP_H 78