Error Handling

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, I'm writing a little command line app, but I have a question about error handling. The code will go something like, main = do (a:b:cs) <- getArgs i <- return (read a :: Int) j <- return (read b :: Int) putStr $ i + j How can I catch any possible cast exception? Ideally, I think I would like to use the ErrorT monad as a means of handling a potentially fairly complex set of inputs, but I can see no way of handling these errors neatly within that monad. Tom -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQE98+VqGse0w80KF2gRAqnMAJ9CMiOWFS+3y2ELu7851MyvTb1aCgCgru+z EtW/mO+WZ0lqtYUECcHyTDE= =r1DY -----END PGP SIGNATURE-----