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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Legit Warnings or not
Date: Sat, 30 Jul 2011 10:27:30 +0200
Organization: cbb software GmbH
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Date: 2011-07-30T10:27:30+02:00
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On Fri, 29 Jul 2011 19:17:25 -0500, Randy Brukardt wrote:

> "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> wrote in message 
> news:a47trh2rfxvh.fy7nhwxd9kpi$.dlg@40tude.net...
>> On Thu, 28 Jul 2011 18:48:30 -0500, Randy Brukardt wrote:
> ...
>>> Yes, for Ada it is too much. Anything implemented now has to be compatible
>>> with the existing language and implementations.
>>
>> And where is any incompatibility? Why array or record cannot be 
>> interfaces?
> 
> Interfaces require multiple inheritance. Multiple inheritance is 
> unimplementable (at least efficiently). It's completely unimplementable in 
> Janus/Ada which is based on fixed, statically sized objects and components. 
> (Generic code sharing is a lot easier.)

1. Ada 2005 has interfaces.

2. The case I gave is fully static, without classes (of arrays or records).
This is not a dynamic interface it is just same thing as "type X is
private;" Private and limited private were interfaces already in Ada 83.

3. It was you arguing for objects which size were indeterminable and
components dynamically allocated. And now?

4. Why a built-in implementation of array of S'Class (what you seemed to be
arguing for) should be easier/more efficient/more compatible to Ada than an
implementation trough Ada.Container only publicly visible as an array?

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