On Mon, Dec 22, 2008 at 3:31 PM, Brian Hurt <bhurt@spnz.org> wrote:

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?

Yeah, it'd be useful. Doesn't really matter, though, because it's on Hackage (http://hackage.haskell.org), so it's just a cabal install MaybeT away.

Now that cabal and cabal-install are reasonably mature, we really don't have to worry about what's blessed as "standard" anymore. :-)

Luke