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=-0.9 required=5.0 tests=BAYES_00,FORGED_GMAIL_RCVD,
	FREEMAIL_FROM autolearn=no autolearn_force=no version=3.4.4
X-Google-Thread: 103376,7b0b4f2e1fdc6b2c,start
X-Google-Attributes: gid103376,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news1.google.com!postnews.google.com!s50g2000hsb.googlegroups.com!not-for-mail
From: amado.alves@gmail.com
Newsgroups: comp.lang.ada
Subject: slicing bidimensional arrays
Date: Fri, 8 Aug 2008 08:26:42 -0700 (PDT)
Organization: http://groups.google.com
Message-ID: 
 <07860302-6075-4b1e-bad6-cedd78c1299f@s50g2000hsb.googlegroups.com>
NNTP-Posting-Host: 193.136.27.133
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
X-Trace: posting.google.com 1218209204 22553 127.0.0.1 (8 Aug 2008 15:26:44
 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Fri, 8 Aug 2008 15:26:44 +0000 (UTC)
Complaints-To: groups-abuse@google.com
Injection-Info: s50g2000hsb.googlegroups.com; posting-host=193.136.27.133;
	posting-account=3cDqWgoAAAAZXc8D3pDqwa77IryJ2nnY
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10_4_11; en)
	AppleWebKit/525.18 (KHTML,
 like Gecko) Version/3.1.2 Safari/525.22,gzip(gfe),gzip(gfe)
Xref: g2news1.google.com comp.lang.ada:1553
Date: 2008-08-08T08:26:42-07:00
List-Id: <comp.lang.ada>

I want to slice a bidimensional array. Or extract/view a row thereof
as a unidimensional array (of the same component type of course). This
is illegal in Ada. So I am designing a slicer/extractor/viewer
subprogram. The arrays can be large, so I want to approximate the
efficiency of view conversions. I'd appreciate confirmation/
infirmation of the following premises.

The internal representation of a bidimensional array is one row after
the other sans separators.
This representation equates that of a unidimensional array (of the
same component type).
All this excluding the range information of course, i.e. looking only
at the data part.
So we can safely (unchecked?) convert between the two array types.

Thanks a lot.