Restrict type of monadic binding

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Revision as of 07:24, 5 November 2007 by Lemming (talk | contribs) (part of "do notation considered harmful" which can be seen as a proposal)

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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 ().