Talk:Functor-Applicative-Monad Proposal

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Revision as of 20:43, 1 January 2011 by Jesin (talk | contribs) (Pure vs. return: new section)

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fail is useful for the error monad, Either String a.


If return is the only method of the Pointed class then Pointed should be included in the hierarchy. Better to be exactly mathematically correct once and for all.

Pure vs. return

When combining pure and return, perhaps we should use the name pure, or something else besides return? It would defy convention, yes, but we would already be making changes that would require a Legacy module for backwards compatability, and it may reduce confusion over what the function actually does, because Haskell's return is nothing like "return" in other languages.