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Newsgroups: comp.lang.ada
Subject: Re: Exceptions
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From: Stephen Leake <stephen_leake@stephe-leake.org>
Date: Tue, 11 Dec 2007 03:07:19 -0500
Message-ID: <u1w9tk62w.fsf@stephe-leake.org>
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Date: 2007-12-11T03:07:19-05:00
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Georg Bauhaus <rm.tsoh+bauhaus@maps.futureapps.de> writes:

> Robert A Duff wrote:
>
>>     when Funcs_Important_Exception =>
>>         -- <comment explaining why this can never happen>
>>         raise Program_Error;
>> Why on earth would anybody write "null;" there?!
>> 
>
> "We know that when this library routine complains,
> it doesn't concern us. Besides, why should we pester
> the customer or the user with messages and tracebacks that
> do not matter?" (In some cultures, openly announcing errors
> is not the preferred strategy  ;-)

For third party libraries that I can't fix, I agree; I have code like
that myself. Although I also strive to change the way I use the
library to avoid the bug, but sometimes that's not possible.

For code I have control over, I agree with Bob, except I use a
different exception; raise Programmer_Error if you've detected a bug.

-- 
-- Stephe