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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Generic-Package Elaboration Question / Possible GNAT Bug.
Date: Tue, 22 Nov 2011 09:29:17 +0100
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Date: 2011-11-22T09:29:17+01:00
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On Mon, 21 Nov 2011 21:40:30 +0100, J-P. Rosen wrote:

> Le 21/11/2011 14:50, Dmitry A. Kazakov a �crit :
>> Conversion of errors into exceptions is an extremely bad idea. The same
>> fault is represented by dynamic pre-/pos-conditions, assertions,
>> accessibility checks, tag errors.
>>  
> Sure. If you have a better idea (short of redesigning the whole language
> or making unacceptable upward incompatibilities), I'm sure the ARG would
> be deligthed to hear. We discussed the issues ad nauseum and could not
> find any other solution.

Hmm, if pre-/post-conditions were a solution, what was the problem?

Regarding run-time exceptions, these are not errors, they are a part of
program's behavior. I think that a solution is not in adding new sources of
exceptions, but by making exceptions contracted (using conditional
contracts, e.g. "I don't raise, if you don't", "I don't raise if there is N
units of memory free" etc).

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de