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_POP_HEAP_H 10 #define _LIBCPP___ALGORITHM_POP_HEAP_H 11 12 #include <__algorithm/comp.h> 13 #include <__algorithm/comp_ref_type.h> 14 #include <__algorithm/sift_down.h> 15 #include <__config> 16 #include <__iterator/iterator_traits.h> 17 #include <__utility/swap.h> 18 19 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 20 #pragma GCC system_header 21 #endif 22 23 _LIBCPP_BEGIN_NAMESPACE_STD 24 25 template <class _Compare, class _RandomAccessIterator> 26 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 27 void 28 __pop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, 29 typename iterator_traits<_RandomAccessIterator>::difference_type __len) 30 { 31 if (__len > 1) 32 { 33 swap(*__first, *--__last); 34 _VSTD::__sift_down<_Compare>(__first, __comp, __len - 1, __first); 35 } 36 } 37 38 template <class _RandomAccessIterator, class _Compare> 39 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 40 void 41 pop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 42 { 43 typedef typename __comp_ref_type<_Compare>::type _Comp_ref; 44 _VSTD::__pop_heap<_Comp_ref>(__first, __last, __comp, __last - __first); 45 } 46 47 template <class _RandomAccessIterator> 48 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 49 void 50 pop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) 51 { 52 _VSTD::pop_heap(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 53 } 54 55 _LIBCPP_END_NAMESPACE_STD 56 57 #endif // _LIBCPP___ALGORITHM_POP_HEAP_H 58