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From: "Pat Rogers" <progers@classwide.com>
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Subject: Re: Refactoring and Ada
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"martin.m.dowie" <martin.m.dowie@ntlworld.com> wrote in message
news:23f98.25730$H37.3045922@news2-win.server.ntlworld.com...
> > The issue is indeed performance.   (The special case to be recognized by
> the
> > compiler is that the clause is in fact a confirming rep clause.)  The
> semantics
> > have to be maintained -- eg, array indexing and for-loop iterations -- but
> the
> > compiler will produce comparably inefficient code unless the special case
> is
> > recognized.  (Most do.)  Think about how array element address calculation
> would
> > work using arbitrarily ascending values for the indexes, and the problem
> becomes
> > evident.
>
> Thought as much - not exactly hard to spot though you would think!

Right.