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From: "Matthew Heaney" <mheaney@on2.com>
Newsgroups: comp.lang.ada
Subject: Re: Concatenation and Characters
Date: Wed, 23 Oct 2002 09:16:40 -0400
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Date: 2002-10-23T09:16:40-04:00
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"Jeffrey Carter" <jrcarter@acm.org> wrote in message
news:3DB60342.3020104@acm.org...
>
> Well, if you say this was so, I guess it probably was so. Having used
> Ada 83 for over a decade, I never encountered a compiler that wouldn't
> check that I was in the range of S (not the index subtype of String).
> Clearly the range of S could be anything from null through Positive. I'm
> surprised that Ada 83 would allow a variable to index an array of
> unknown range without a bounds check.

We were using Ada on Solaris, and it was in fact very easy to get a core
dump if you used an initialized variable to index an array.

Many Ada83 programmers made the same mistake: assuming that there's an
automatic check when indexing an array.  There was not, in Ada83.  There is
now, in Ada95.