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Jul 05, 2004 at 2:19 PM
I haven't use Java however I can see that checked exceptions might be a bit too much of a versioning hassle. OTOH the concept does appeal to my meticulous side. I think the concept of a non-enforced checked exception (perhaps a better name is "documented exceptions") is a good idea. I have run into exceptions in shipping code that weren't documented in the MSDN docs! So even though I thought I was handling everything, I wasn't. And the real drag of it all was that it wasn't a fatal exception. It was something, that if I had caught it I could have put a message to the user that they needed to re-install/repair in order to use a particular feature. I am also intrigued by the concept of slicing exceptions in a different fashion besides inheritance hierarchy. I have always thought the .NET exception hierarchy could be better. There are some exceptions that inherit directly from System.Exception. Other inherit from the vestigial System.ApplicationException. And worse, it is not easy to tell which exceptions should only be thrown by the runtime like System.NullReferenceException or System.IndexOutOfRangeException. I still occassionally catch folks throwing those exceptions rather than the ones deriving from System.ArgumentException. Perhaps all the runtime exceptions should implement an attribute or marker interface like IFatalException or IRuntimeError or something like that.
Jun 14, 2004 at 8:53 PMI got the chance to tell Anders this at the PDC which was cool. In '85 a couple of my buddies and I worked in a PC lab on campus. In our Pascal course, we managed to convince the teacher to let us do our projects on PCs using Turbo Pascal. The rest of the class used the campus mainframe (Cyber something or other) with a crappy line editor and I'm not even sure what they used for a debugger (printf equiv?). Anyway, we smoked the rest of the class. The teacher was quite impressed with how quickly we finished our projects and the quality of the code.