On Wed, Sep 03, 2008 at 06:44:22PM -0500, John M. Dlugosz wrote: > I'm trying to work out some details of this area, but I don't understand > what S04 is trying to say. Could someone please point me in the right > direction? I'd be happy to then edit the S04 to contribute. > > > In S04, the "Exceptions" section mentions that $! contains multiple > exceptions. > So what type is it? Why isn't it @! ? I says that they are thrown as a > single new exception. So what type is that new exception? A multi-exception > of > some kind?
No, just the new exception, which merely has to contain the old unhandled exceptions somehow in case the user wants more information. > How do you get multiple pending exceptions in the first place? > > If you mean that exceptions can be thrown (and handled) within the handling of > another exception, then the list should be more of a stack. Should the > handler > then see the topmost one as its topic? If you really did make the whole list > the topic then it would be difficult to match. All I care is that we don't discard useful information here. Only the outermost exception needs to be directly matchable against via $!. > How would you access the other exceptions in $!, presumably testing them for > .defined etc.? I would assume that the $! object can be accessed as an array in that case, unless someone can argue for a different interface. By the way, I'd like to see a user interface where the outer exception is the one printed out in simple form, with the complete "cockpit recorder" dump of information going into a file that is browser accessible with a click on a link in the error message to "more info". Larry
