Graham Klyne <[EMAIL PROTECTED]> writes: > 2. I like to distinguish between "expected errors" and "unexpected > errors". Having been burned in the past by using exceptions (not FP), > I try to use them only for conditions that are truly unexpected; > i.e. _exceptional_. Bad input, IMO, is something that is not > unexpected, so I don't really like to handle that via exceptions.
I agree, trying to handle exceptions caused by incorrect input is just needless complication, the program should crash, and the calling function should be fixed instead. Common errors that happen to me are: Prelude.head : empty list Prelude.read : no parse and Prelude.(!!) : index too large and so on. Is there any easy way (TH?) to amend these to output the line number of the offending caller? It would be a great improvement to see something like Prelude.head : empty list in Foo.hs, line 4711 since programs generally contain many, many calls to functions like these. -kzm -- If I haven't seen further, it is by standing in the footprints of giants _______________________________________________ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe