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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: MI in Ada 200X (was: Suggestion for Ada 200x - Interface
 inheritance)
Date: Thu, 29 May 2003 11:17:39 +0200
Organization: At home
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Preben Randhol wrote:

> Mário Amado Alves wrote:
> 
>> Everybody wants class MI. The reasons it was left out of Ada 95 and
>> 83, the cons, are weaker than the pros. So every Adaist whishes to see
>> it in Ada 200X.
> 
> Convince me :-) Seriously what are the pros and cons of MI.

Hey, the burden of proof is on your side! (:-)). SI is an artificially 
restricted MI. Consider overloading allowed only in one argument. Silly? 
Then convince me that you really need it for two arguments. And, well, 
there are work-arounds A, B, C etc.

Now consider a possibility that MI has a problem X. Then, obviously, either 
X is a problem of the concept of inheritance (1), or X is a problem of the 
language, implementation, our understanding etc (2).

Thus either:

(1) we should better dismiss SI as well.

or

(2) we should carefuly check the language to implement MI correctly.

-- 
Regards,
Dmitry A. Kazakov
www.dmitry-kazakov.de