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7ed7d4ccb8
This is a fairly mechanical change, it just moves each algorithm into its own header. This is a NFC. Note: during this change, I burned down all the includes, so this follows "include only and exactly what you use." Differential Revision: https://reviews.llvm.org/D103583
64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___ALGORITHM_MAKE_HEAP_H
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#define _LIBCPP___ALGORITHM_MAKE_HEAP_H
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#include <__config>
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#include <__algorithm/comp_ref_type.h>
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#include <__algorithm/sift_down.h>
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#include <__iterator/iterator_traits.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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#pragma GCC system_header
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#endif
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_LIBCPP_PUSH_MACROS
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#include <__undef_macros>
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_LIBCPP_BEGIN_NAMESPACE_STD
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template <class _Compare, class _RandomAccessIterator>
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_LIBCPP_CONSTEXPR_AFTER_CXX11 void
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__make_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp)
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{
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typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type;
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difference_type __n = __last - __first;
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if (__n > 1)
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{
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// start from the first parent, there is no need to consider children
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for (difference_type __start = (__n - 2) / 2; __start >= 0; --__start)
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{
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_VSTD::__sift_down<_Compare>(__first, __last, __comp, __n, __first + __start);
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}
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}
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}
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template <class _RandomAccessIterator, class _Compare>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
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void
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make_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp)
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{
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typedef typename __comp_ref_type<_Compare>::type _Comp_ref;
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_VSTD::__make_heap<_Comp_ref>(__first, __last, __comp);
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}
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template <class _RandomAccessIterator>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
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void
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make_heap(_RandomAccessIterator __first, _RandomAccessIterator __last)
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{
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_VSTD::make_heap(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>());
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}
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_LIBCPP_END_NAMESPACE_STD
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_LIBCPP_POP_MACROS
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#endif // _LIBCPP___ALGORITHM_MAKE_HEAP_H
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