Hi,

> Does that make sense?

Yes. It is what I've presented in seminars the past as an abridged
polymorphic iterator, or simply abridged iterator.

> Is this of any use? How will I improve it? (there's a lot to be done I know)

I've found such creatures useful in a couple of cases. I haven't had a
chance to look at the implementation yet, but hopefully will if time
permits.

Kevlin
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Kevlin Henney phone: +44 117 942 2990
Curbralan Limited mobile: +44 7801 073 508
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