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From: "Randy Brukardt" <randy@rrsoftware.com>
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Subject: Re: Class hierarchy of exceptions (Ada, C++)
Date: Mon, 28 Mar 2005 16:56:38 -0600
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Date: 2005-03-28T16:56:38-06:00
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"Ludovic Brenta" <ludovic.brenta@insalien.org> wrote in message
news:87oed6wvyx.fsf_-_@insalien.org...
...
> The C++ way of catching all exceptions of a class and its derived
> classes can lead to confusion.  One can have multiple exception
> handlers for the same exception and it may not be immediately obvious
> to the reader which one is called.  I see this as a maintenance
> problem.

If Ada had some sort of exception classes, there certainly would be a
overlapping handler check. Having two different handlers for any possible
exeception would be prohibited (it certainly is now). So I don't find this
much a reason for not having this capability. The reasons for not having it
are finalization, memory allocation, and compatibility with Ada 83 & Ada 95.
(And mainly that the person working on it ran out of energy for it, and no
one else picked it up.)

                         Randy.