automaticly create the ana, cata, hylomorphisms

[Keith Wansbrough]

> Hello programmers,
> 
> I have a problem to solve and don't have a clue where to start.

This is a homework question.  Please read

http://www.haskell.org/hawiki/HomeworkHelp

for some helpful hints.

By the way, you shouldn't post the same message to multiple lists - you should choose the right one (haskell-cafe in this case), or if you must, cross-post one message to both.  This means people who subscribe to both won't see your message twice.

--KW 8-)
-- 
Keith Wansbrough <kw217 at cl.cam.ac.uk>
http://www.cl.cam.ac.uk/users/kw217/
University of Cambridge Computer Laboratory.