> I can't see any fundamental reason why exception handling has to occur in > the IO monad.
Read the paper _A Semantics for Imprecise Exceptions_. The problem is that the evaluation order of Haskell would have to be fixed for this not to lose referential transparency. What is the value of catchExcept (show (makeExcept "E1" + makeExcept "E2")) (\x -> x) ? Haskell wouldn't be "purely functional" any more. http://research.microsoft.com/~simonpj/Papers/imprecise-exn.htm --KW 8-) -- Keith Wansbrough <[EMAIL PROTECTED]> http://www.cl.cam.ac.uk/users/kw217/ University of Cambridge Computer Laboratory. _______________________________________________ Haskell mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell
