<p>In <a href="https://github.com/mlpack/mlpack/pull/699#discussion_r69037047">src/mlpack/core/tree/rectangle_tree/minimal_coverage_sweep.hpp</a>:</p>
<pre style='color:#555'>> + * @tparam SplitPolicy The class that provides rules for inserting children of
> + * a node that is being split into two new subtrees.
> + */
> +template<typename SplitPolicy>
> +class MinimalCoverageSweep
> +{
> + private:
> + /**
> + * Class to allow for faster sorting.
> + */
> + template<typename ElemType>
> + struct SortStruct
> + {
> + ElemType d;
> + int n;
> + };
</pre>
<p>Okay, I opened <a href="https://github.com/mlpack/mlpack/issues/712" class="issue-link js-issue-link" data-url="https://github.com/mlpack/mlpack/issues/712" data-id="163035605" data-error-text="Failed to load issue title" data-permission-text="Issue title is private">#712</a> about this and we can figure it out there instead of inside this PR, so we can get this one done more quickly. It is probably easier to do comparisons by making a separate branch from this one. Don't feel obligated to do that; I will eventually get around to it if you don't want to. But it seems like you never turn things down, so I guess you will probably do it anyway. :)</p>
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