Hello! I'm confused by the error handling in Haskell. I've written a program that uses a combined monad of type: type MyMonad a = ErrorT MyErrorType (StateT MyStateType IO) a (MyErrorType is an instance of Error) Therefore, to handle IO Errors inside of MyMonad I need to write: foo :: MyMonad a foo = do ... inp <- liftIO (getChar `catchError` (\e -> if isEOFError e then return '\0' else return '?') ) case inp of '\?' -> throwError ... .... `catchError` myErrorTypeHandler This of course is cumbersome and ugly and I'm sure there is a way to do better. Helpful advice is welcome! _________________________________________________________________ FREE pop-up blocking with the new MSN Toolbar - get it now! http://toolbar.msn.click-url.com/go/onm00200415ave/direct/01/