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30 lines
646 B
C
30 lines
646 B
C
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// -*-mode:c++;indent-tabs-mode:nil;c-basic-offset:4;tab-width:8;coding:utf-8-*-
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// vi: set et ft=cpp ts=4 sts=4 sw=4 fenc=utf-8 :vi
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#ifndef CTL_PARTITION_H_
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#define CTL_PARTITION_H_
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#include "utility.h"
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namespace ctl {
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template<typename RandomIt, typename Compare>
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RandomIt
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partition(RandomIt first, RandomIt last, Compare comp)
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{
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auto pivot = *ctl::move(last - 1);
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auto i = first - 1;
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for (auto j = first; j < last - 1; ++j) {
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if (comp(*j, pivot)) {
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++i;
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ctl::swap(*i, *j);
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}
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}
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ctl::swap(*(i + 1), *(last - 1));
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return i + 1;
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}
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} // namespace ctl
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#endif // CTL_PARTITION_H_
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