[Haskell-cafe] state and exception or types again...
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Wed Aug 30 05:02:39 EDT 2006
Il Tue, Aug 29, 2006 at 10:02:38AM +0100, Brian Hulley ebbe a scrivere:
Ím getting back so late because it took me a while to understand
> data Result a
> = Good a State Output
> | Bad State Output
> deriving Show
> case runSOIE m x of
> Good a y o1 ->
> case runSOIE (f a) y of
> Good b z o2 -> Good b z (o1 ++ o2)
> Bad z o2 -> Bad z (o1 ++ o2)
> Bad z o2 -> Bad z o2 -- (*)
This is brilliant and highly instructive (for me at least)!!
Thank you very much.
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