[Haskell-cafe] foild function for expressions

Kalman Noel kalman.noel at bluebottle.com
Tue Dec 4 07:11:26 EST 2007

Ryan Ingram wrote:
> On 12/3/07, Kalman Noel <kalman.noel at bluebottle.com> wrote:
> > You're confusing sum and product types.
> I'm not so sure; it looks like they already have that type (Exp) and wants
> to use AlgExp to hold the "folding" functions used.

Ah, I didn't catch that on the first read.  I suppose Carlo should then
tell us what Exp exactly looks like; and it would be nice, too, to
explain to me what the function in question is supposed to achieve then.
He doesn't seem to want to reduce the expression, after all.


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