id	summary	reporter	owner	description	type	status	priority	milestone	version	resolution	keywords	cc
8	Use existing monad infrastructure	judah		"Haskeline's monadic interface has custom `MonadIO` and `MonadTrans` classes.  It might be nice to use an existing framework like the `mtl` library; but we need the`MonadException` class which isn't in `mtl`.  

Other implementations of `MonadException`:
 - http://hackage.haskell.org/packages/archive/hscurses/1.3/doc/html/UI-HSCurses-MonadException.html
 - http://hackage.haskell.org/trac/haskell-prime/ticket/110
 - http://darcs.haskell.org/takusen/Control/Exception/MonadIO.hs
"	enhancement	closed	minor	0.2	0.1	fixed