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,FREEMAIL_FROM
	autolearn=ham autolearn_force=no version=3.4.4
X-Google-Thread: a07f3367d7,caabf5265fad78e5
X-Google-Attributes: gida07f3367d7,public,usenet
X-Google-NewGroupId: yes
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news2.google.com!news1.google.com!volia.net!news2.volia.net!feed-A.news.volia.net!news.banetele.no!dotsrc.org!filter.dotsrc.org!news.dotsrc.org!not-for-mail
Date: Mon, 29 Jun 2009 18:51:11 +0200
From: Martin Krischik <krischik@me.com>
User-Agent: Thunderbird 2.0.0.22 (Macintosh/20090605)
MIME-Version: 1.0
Newsgroups: comp.lang.ada
Subject: Re: unsigned type
References: <eb3f45l5378gipiqeomr67uvtsdan84ihk@4ax.com>
In-Reply-To: <eb3f45l5378gipiqeomr67uvtsdan84ihk@4ax.com>
X-Enigmail-Version: 0.95.7
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Message-ID: <018nh6-cu72.ln1@macpro.krischik.com>
Organization: SunSITE.dk - Supporting Open source
NNTP-Posting-Host: 89.236.182.117
X-Trace: news.sunsite.dk
 DXC=E9Yg[RZXeBGI[NbmUoDmmGYSB=nbEKnkK_OR4oRM;NgAS5daR30PdPEV:_8RJBabHM?QA2cYN[o4A<?E]inS?TFFmk_R0H;_HKAaBPdSh0TI0D
X-Complaints-To: staff@sunsite.dk
Xref: g2news2.google.com comp.lang.ada:6722
Date: 2009-06-29T18:51:11+02:00
List-Id: <comp.lang.ada>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Rob Solomon schrieb:
> I am trying to learn Ada.  I am very familiar w/ Modula-2.

I have done Modula-2 as well - so I know what you want. And reading all
your other post I think you are on the wrong track. I might be wrong of
course.

Modula-2 is missing one important feature from Pascal: ranges. Ranges is
a different way of thinking. With ranges you don't think about bit and
bytes any more. With ranges you should stop thinking: What is the
largest number one can fit into 32 bit or is CARDINAL large enough for
my need.

Instead you should thing: what is the largest number I truly need. Not
the CPU should be the centre of your thinking but your problem at hand.

i.E.

type Day_Type   is range    1 ..   31;
type Month_Type is range    1 ..   12;
type Year_Type  is range 1800 .. 2100;

type Date_Type is
   record
     Day   : Day_Type;
     Month : Month_Type;
     Year  : Year_Type;
   end record;

Regards

Martin
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.8 (Darwin)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFKSPD8ijwKaHyem9cRAnQbAKD06jn9yXF9NtaMymDa/EwjpPSoJwCg63to
d52QWtBIkZwzsD0aIBOnzHw=
=JRqC
-----END PGP SIGNATURE-----