Because Maybe is already a monad and it's nice to fail in the monad of choice, e.g. if I'm in the list monad I get empty list instead, or if I'm in the Result monad from JSON it'll fail in there. ‘Course "fail" is suboptimal and MonadError might be better.
'fail' really shouldn't be in Monad. My brain ignores its existence by now :).
Grazie mille, a dopo… ;-)
A dopo! Francesco _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
