public IEnumerator <TElement> GetEnumerator()
{
Buffer <TElement> buffer = new Buffer <TElement>(source);
if (buffer.count > 0)
{
EnumerableSorter <TElement> sorter = GetEnumerableSorter(null);
int[] map = sorter.Sort(buffer.items, buffer.count);
sorter = null;
for (int i = 0; i < buffer.count; i++)
{
yield return(buffer.items[map[i]]);
}
}
}
internal abstract EnumerableSorter <TElement> GetEnumerableSorter(EnumerableSorter <TElement> next);