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Added recursive inplace_stable_sort implementation

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Ion Gaztañaga
2016-05-13 00:28:29 +02:00
parent 75983a43ce
commit 5a118de803
1 changed files with 15 additions and 0 deletions
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15
include/boost/move/algo/detail/merge_sort.hpp
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@@ -41,6 +41,21 @@ namespace movelib {
static const unsigned MergeSortInsertionSortThreshold = 16; static const unsigned MergeSortInsertionSortThreshold = 16;
template <class RandIt, class Compare>
void inplace_stable_sort(RandIt first, RandIt last, Compare comp)
{
typedef typename iterator_traits<RandIt>::size_type size_type;
if (size_type(last - first) <= size_type(MergeSortInsertionSortThreshold)) {
insertion_sort(first, last, comp);
return;
}
RandIt middle = first + (last - first) / 2;
inplace_stable_sort(first, middle, comp);
inplace_stable_sort(middle, last, comp);
merge_bufferless_ONlogN_recursive
(first, middle, last, size_type(middle - first), size_type(last - middle), comp);
}
// @endcond // @endcond
template<class RandIt, class RandIt2, class Compare> template<class RandIt, class RandIt2, class Compare>