On Thu, May 02, 2002 at 11:42:35AM +0200, Alain Frisch wrote:
> 
> I don't understand what this encoding of extensible tuples allows,
> compared to the simple minded solution [the type of an n-typle is
> (t1,(t2,...(tn,unit)...)) ]

You're right -- and I should think more before I write -- it's
essentially the same solution. You do need to distinguish the
kind of sequences from the kind of types, though (that is, to
distinguish sequence extension ; from the product * and the
empty sequence nil from the unit type), otherwise you can't
distinguish a tuple from a cascade of pairs. But, apart from
that, you're right, it's the same thing.

-- 
François Pottier
Francois.Pottier@inria.fr
http://pauillac.inria.fr/~fpottier/
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