Alex Shinn scripsit:

> Specifically I think because of the combinatorial explosion in memory
> needed, such operations are better served by a generating API than
> one which returns a complete data structure, either as an abstract
> generator or as a loop syntax extension.

I agree that such an API would be a Good Thing.  However, I don't agree
that because something might run till the Big Rip (or Big Crunch)
if applied to sufficient data, that it should never be used at all.
When you need exponential algorithms, and your problem is small enough
to use them, you should have them.