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From: mheaney@ni.net (Matthew Heaney)
Subject: Re: 1 and 2d image representations
Date: 1997/11/01
Message-ID: <mheaney-ya023680000111971013560001@news.ni.net>#1/1
X-Deja-AN: 286478651
References: <344E97A8.688C@eleceng.adelaide.edu.au>
 <34556F0F.62B5@dynamite.com.au>
Organization: Estormza Software
Newsgroups: comp.lang.ada
Date: 1997-11-01T00:00:00+00:00
List-Id: <comp.lang.ada>


In article <34556F0F.62B5@dynamite.com.au>, aebrain@dynamite.com.au wrote:


>If performance is a big issue, then Unchecked Conversion really could be
>the way to go.

In practice, you can reduce the overhead to zero by making careful use of
attributes when iterating over an array, for example

for Index in O'Range loop
   ... O (Index) ...
end loop;

There is no range check here, because Index is in the index subtype of O,
and therefore no check is necessary.

--------------------------------------------------------------------
Matthew Heaney
Software Development Consultant
<mailto:matthew_heaney@acm.org>
(818) 985-1271