[Haskell-cafe] Re: stateful walk through a tree?

[David Tolpin]

Hi,

>> I am looking for help in design of a stateful tree walker.
>
> I think that you can use Data.Traversable to great effect.

thanks, the advice has helped. I can't use it directly since i didn't yet come up with a consistent solution to serialization of events, but I am going to compile the second pass into combined actions.

>
> Well, Haskell doesn't have mutable variables as LISP or ML do.

I meant STM, sorry for being unclear.

David