From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,56131a5c3acc678e
X-Google-Attributes: gid103376,public
X-Google-ArrivalTime: 2003-11-25 13:56:37 PST
Path: 
 archiver1.google.com!news2.google.com!news.maxwell.syr.edu!hammer.uoregon.edu!skates!not-for-mail
From: Stephen Leake <Stephe.Leake@nasa.gov>
Newsgroups: comp.lang.ada
Subject: Re: Question about OO programming in Ada
Date: 25 Nov 2003 16:48:58 -0500
Organization: NASA Goddard Space Flight Center (skates.gsfc.nasa.gov)
Message-ID: <uhe0sqfud.fsf@nasa.gov>
References: <bq092s$9ph$1@online.de>
NNTP-Posting-Host: shevek.gsfc.nasa.gov
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Trace: skates.gsfc.nasa.gov 1069797210 28117 128.183.235.101 (25 Nov 2003
 21:53:30 GMT)
X-Complaints-To: usenet@news.gsfc.nasa.gov
NNTP-Posting-Date: 25 Nov 2003 21:53:30 GMT
User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3
Xref: archiver1.google.com comp.lang.ada:2943
Date: 2003-11-25T21:53:30+00:00
List-Id: <comp.lang.ada>

"Ekkehard Morgenstern" <ekkehard.morgenstern@onlinehome.de> writes:

> Hi guys,
> 
> I have a question about object-oriented programming in Ada:
> 
> Do I have to use class-wide types for object-oriented programming, or could
> I use regular access types?

Hmm. This very much depends on exactly what you mean by
"object-oriented". 

If you mean getting run-time dynamic dispatching, then somewhere in
your system you need a class-wide type (not everywhere). You also need
derived types with primitive operations. If these terms don't make
sense, please read an Ada book, such as "Ada as a Second Language" by
Norm Cohen; that will teach you what you need to know much more
quickly than asking here.

Or, try to explain here what you mean by "object-oriented". Use either
C++ or Ada terms, but try to be very explicit. Then we can tell you
how to do that correctly in Ada.

You have several very basic misunderstandings; reading a good Ada book
would probably be a good idea.

-- 
-- Stephe