I wrote my own implementation of MaybeT (which was a usefull exercise),
but a quick google showed:
http://www.haskell.org/haskellwiki/New_monads/MaybeT
But I'm wondering why it's not in the standard library. The standards
committee just hasn't gotten around to it yet? Or was there some
discussion of this in the past on some (public) maillist, that my
admittedly shallow googling failed to uncover, that someone could point me
at?
Thanks.
Brian
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