Okay, maybe I misunderstood, I thought by stream
processors you meant functions of the type:
process :: [a] -> [a]
where both the input and the output are lazy lists (streams)
I would assume if you want to have a stateful filter you need
to maintain the state by using either:
process :: [a] -> IO [a]
process :: <state> -> [a] -> [a]
process :: [a] -> ST s [a]
Keean.
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