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 #if _LIBCPP_STD_VER >= 20 30 31 _LIBCPP_BEGIN_NAMESPACE_STD 32 33 namespace ranges { 34 namespace __is_heap { 35 36 struct __fn { 37 template <class _Iter, class _Sent, class _Proj, class _Comp> 38 _LIBCPP_HIDE_FROM_ABI constexpr static bool 39 __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 _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr bool 52 operator()(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const { 53 return __is_heap_fn_impl(std::move(__first), std::move(__last), __comp, __proj); 54 } 55 56 template <random_access_range _Range, 57 class _Proj = identity, 58 indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>> _Comp = ranges::less> 59 _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr bool 60 operator()(_Range&& __range, _Comp __comp = {}, _Proj __proj = {}) const { 61 return __is_heap_fn_impl(ranges::begin(__range), ranges::end(__range), __comp, __proj); 62 } 63 }; 64 65 } // namespace __is_heap 66 67 inline namespace __cpo { 68 inline constexpr auto is_heap = __is_heap::__fn{}; 69 } // namespace __cpo 70 } // namespace ranges 71 72 _LIBCPP_END_NAMESPACE_STD 73 74 #endif // _LIBCPP_STD_VER >= 20 75 76 #endif // _LIBCPP___ALGORITHM_RANGES_IS_HEAP_H 77