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From: Robert Dewar <robert_dewar@my-deja.com>
Subject: Re: Suprise of comparison result
Date: 1999/10/18
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References: <37fd7e17.0@news.pacifier.com> <37FDB8D1.CC4CDB7B@gecm.com>
 <37fece61.0@news.pacifier.com>
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Date: 1999-10-18T00:00:00+00:00
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In article <37fece61.0@news.pacifier.com>,
  "Steve Doiel" <nospam_steved@pacifier.com> wrote:
> The behavior I had hoped for was a compile time error when I
attempted to
> compare an integer value (-32768) to a modular value.  I
understand that
> things just don't work that way, but it was a bit of a
dissapointment.


But what possible basis would there be for an error here.
It is very useful to have unary minus work on modular
numbers, and it would indeed be a nasty irregularity
if -x was not the same as 0-x for modular types.

If you properly understand twos complement arithmetic,
the use of unary minus is often convenient, for example
doing

   x := -1;

to set x to all 1 bits is often convenient ...


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