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From: amir@iae.nsk.su (Amir Yantimirov)
Newsgroups: comp.lang.ada
Subject: Re: Imitation is the sincerest form of flattery
Date: 22 Mar 2003 02:01:34 -0800
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Dmitry A. Kazakov <mailbox@dmitry-kazakov.de> wrote in message news:<vqil7v81l8p8ocbv2ke9ectl8l33rr3gs8@4ax.com>...
> On Thu, 20 Mar 2003 14:27:12 GMT, "Frank J. Lhota"
> <NOSPAM.lhota.adarose@verizon.net> wrote:
> 
> >"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> wrote in message
> >news:p2vi7vs64p33mpnbsfsn43cvh72l44tm95@4ax.com...

<Snip>

> The above isn't an array. You cannot use it where an array is
> expected. It has no 'First, 'Last, no slices etc.
> 
> -----
> The problem with ADT in Ada is that technically there is only two (*)
> type interfaces you can inherit from (implement privately):
> 
> type ... is private;
> type ... is limited private;
> 
> At the same time Ada's set of built-in interfaces is far more richer:
> 
> type ... is access ...;
> type ... is delta ...;
> type ... is mod ...;
> type ... is array ...;
> type ... is record ...;
> protected type ...;
> task type ...;
> 
> etc.
> 
> In my view to fully support ADT would mean that any of such type
> interfaces would be available for private implementation.
> 

In my ideal world you don't need inhere anything:
http://www174.pair.com/yamir/programming/interfaces.htm

Sorry, if I annoy somebody.

> -----
> (*) I intentionally omit type ... is tagged ..., because I believe
> that *all* types have to be tagged.

Not rare opinion. But I found it somewhere contradicting with you background :).
Lots of types I works with has hardwired bits structure. 

Amir Yantimirov

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