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From: Shark8 <onewingedshark@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: Efficient Sequential Access to Arrays
Date: Thu, 26 Jul 2012 10:40:32 -0700 (PDT)
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Date: 2012-07-26T10:40:32-07:00
List-Id: <comp.lang.ada>

On Thursday, July 26, 2012 7:46:04 AM UTC-6, Dmitry A. Kazakov wrote:
>
> Some would disagree, but IMO in a well-written Ada program you should nev=
er
> ever need 'Valid. Don't do Unchecked_Conversion with doubtful outcome.
> Don't use stream attributes for constrained types.

It might not be avoidable though; the presence of 'Valid however does let y=
ou ensure that your [sub]typing assumptions are met. This might be especial=
ly true if you're importing data from some third-party where the input-form=
at doesn't specifically conform to your expected-inputs. (This happens with=
 disturbing frequency in handling electronic medical records; usually becau=
se whoever started the record was using a spreadsheet.)

> Don't use for X'Address
> use Z'Address for the purpose of conversion etc.

What do you mean here? Overlaying?