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From: Robert Dewar <robert_dewar@my-deja.com>
Subject: Re: Binding a type to a union.
Date: 1999/11/25
Message-ID: <81ih05$ir$1@nnrp1.deja.com>#1/1
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In article <81gtd5$rfb$1@nnrp1.deja.com>,
  Ted Dennison <dennison@telepath.com> wrote:
> Perhaps that's because compilers ignore pragmas they don't
recognize.
> Just for fun, try putting a "pragma Foo_Bar;" in one of your
source
> files and compile it with Gnat. The worst you'll see is a:
>    warning: unrecognized pragma "Foo_Bar --
> T.E.D.

Well I assume this is a joke, but I did not see a smiley. Of
COURSE it is the case that if you use Unchecked_Union to
interface to a C union, and it was not implemented, then your
program wouldn't work.

And if indeed the above was intended to be serious, then please
note that a small amount of research would have shown you that
most Ada 95 compilers implement this pragma. It was one of the
first bits of extended Ada language technology agreed on by the
ARA technical committee, and has since been discussed by the ARG
as a possible semi-standard extension.


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