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=unavailable autolearn_force=no version=3.4.4
Path: 
 eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!mx02.eternal-september.org!.POSTED!not-for-mail
From: "Jeffrey R. Carter" <spam.jrcarter.not@spam.not.acm.org>
Newsgroups: comp.lang.ada
Subject: Re: Declaring constants for a abstract tagged type and concrete sub
 classes
Date: Tue, 07 Jul 2015 13:18:48 -0700
Organization: Also freenews.netfront.net; news.tornevall.net;
 news.eternal-september.org
Message-ID: <mnhc4j$5p0$1@dont-email.me>
References: <0ade6abf-34c0-46e2-8bd9-d60a00056321@googlegroups.com>
 <mndq80$h9m$1@dont-email.me>
 <28d2406c-d579-4710-9b34-108317fe9abf@googlegroups.com>
 <mnee97$59n$1@dont-email.me>
 <d191bb4e-0feb-4a7e-af27-db78721f6f68@googlegroups.com>
 <mnh1ok$r6r$1@dont-email.me>
 <87b318bc-9534-413a-ad3c-dc2a12855ef2@googlegroups.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 7bit
Injection-Date: Tue, 7 Jul 2015 20:17:25 +0000 (UTC)
Injection-Info: mx02.eternal-september.org;
 posting-host="a3855fbfe1a666be9aefba0563039ed5";
	logging-data="5920"; mail-complaints-to="abuse@eternal-september.org";
	posting-account="U2FsdGVkX1/TifivZ8K7SRSjAKLFMoxRsz2biSx0iPY="
User-Agent: Mozilla/5.0 (X11; Linux x86_64;
 rv:31.0) Gecko/20100101 Thunderbird/31.7.0
In-Reply-To: <87b318bc-9534-413a-ad3c-dc2a12855ef2@googlegroups.com>
Cancel-Lock: sha1:n7RzsXqdkFQlBDo/JA3TH3jwNFI=
Xref: news.eternal-september.org comp.lang.ada:26690
Date: 2015-07-07T13:18:48-07:00
List-Id: <comp.lang.ada>

On 07/07/2015 12:51 PM, Serge Robyns wrote:
> 
> This one did the trick!  I'm marveled by the syntax and the meaning of the
> standalone tick (').  I'm wondering how I'll master these idiosyncrasies.
> I've tried to read years back the 95 RM but honestly it isn't bedtime
> lecture.  The wiki book is much readable but seems to leave quite some ground
> unexplored.  And I must admit I don't capture the essence of the difference
> between the above one and below one, except the obvious (variable vs. type)
> it puzzles me that it builds a variable out of type definition.

Yes, the ARM is not a good way to learn the language, and the wiki book leaves
some things to be desired. If you have experience with another language, I
recommend /Ada Distilled/:

http://www.adaic.org/wp-content/uploads/2010/05/Ada-Distilled-24-January-2011-Ada-2005-Version.pdf

If you'd like more of a beginner's introduction, there's /Ada 95: The Craft of
Object Oriented Programming/:

http://archive.adaic.com/docs/craft/craft.html

Both are freely available on line.

-- 
Jeff Carter
"I've seen projects fail miserably for blindly
applying the Agile catechism: we're Agile, we
don't need to stop and think, we just go ahead
and code!"
Bertrand Meyer
150