Range is interesting
Early implementations had a separate RangeIter class
✗ Lots of attribute coupling between Range and RangeIter ☹
But Range objects are immutable
Will always return the same sequence of values
Thus Range.reify($n) can easily compute and return values and the Range needed to continue the sequence
> (0..10).reify(5).perl (0, 1, 2, 3, 4, 5..10)continued...