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Restrict type of monadic binding

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Revision as of 07:24, 5 November 2007 by Lemming (Talk | contribs)

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According to Do notation considered harmful#Safety the type of the monadic binding combinator (>>) should be restricted to

(>>) :: m () -> m a -> m a
This way, you can omit
 _ <-
only if the monadic return value has type