On Sat, Feb 28, 2009 at 9:36 PM, Tom Poliquin <poliquin@softcomp.com> wrote:

I'm working on a project (in Haskell) and was
given some old Java code to indicate the required
functionality for a particular function. It's a page of
nested (4 deep) if statements. (That's probably
why they gave me the code, no one could
describe it).

I would normally convert this to an FSM,
..... but this is Haskell!

So,

1) Is there a nice (canonical) way of eliminating
nested evil in Haskell? I thought that perhaps making
a tuple of all the if's conditions and patterm matching
on them might make a bit more comprehensible.
Likely there's a better way.

2) If an FSM is appropriate is there a 'standard'
Haskell FSM implementation?
I looked around and could find very little. One
paper talked about Arrows but that seems like a bit
of overkill ..

It actually seems like a fun problem .. if I
had the time ..

Any thoughts greatly appreciated!

Tom
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