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[[!comment format=mdwn
username="http://claimid.com/strager"
nickname="strager"
subject="comment 2"
date="2012-08-11T04:55:13Z"
content="""
In fact, making a dedicated data type or some typeclasses may be more appropriate:
class Cancelable a where cancel :: a -> IO ()
class Pauseable a where pause :: a -> IO ()
-- Alternatively:
data Transfer = Transfer { cancel :: IO (), pause :: IO () }
-- Or both!
"""]]
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