[Haskell-cafe] throwDynIO ?

Hi all! I'm a newcomer to haskell programming with a lisp/scheme background. Last week I've been reading a lot about the monadic approach to IO and I should said I'm pretty fascinated about the flexibility it allows. Currently I'm trying to grasp haskell exception handling and although I find it mostly clear I'm a bit confused regarding the lack of a throwDynIO action "paralelling" throwIO, as there are dynamic variants for the other throw functions: throwDyn - throw throwDynTo - throwTo I understand that the same effect could be conjured up by throwIO (DynException (...))) magic. But the lack of symmetry still disturbes me. Am I missing something? Thank you in advance. Regards, Carlos