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Date:      Mon, 3 Apr 2000 09:22:09 -0700 (PDT)
From:      John Polstra <jdp@polstra.com>
To:        bright@wintelcom.net
Cc:        current@freebsd.org
Subject:   Re: MLEN and crashes
Message-ID:  <200004031622.JAA19715@vashon.polstra.com>
In-Reply-To: <20000403023858.F21029@fw.wintelcom.net>
References:  <Pine.BSF.4.21.0004022118510.1442-100000@alphplex.bde.org> <20000403084330.6A6DC483D@hcswork.hcs.de> <20000403023858.F21029@fw.wintelcom.net>

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In article <20000403023858.F21029@fw.wintelcom.net>,
Alfred Perlstein  <bright@wintelcom.net> wrote:
> 
> If you're worried about such things happening then you can use
> the pre-processor to catch things that may make your structures
> too large.
> 
> > I wonder how too "big" can be detected. The code in question is perfectly
> > valid syntactically and semantically correct C-code.
> 
> There's code that #error (maybe #warning?) when it can detect that the
> size of a struct has been unreasonably grown, it's done via the
> pre-processor.

I doubt if it's possible to implement that at compile time.  Remember,
the preprocessor doesn't understand "sizeof".  It doesn't recognize
keywords in expressions at all.

John
-- 
  John Polstra                                               jdp@polstra.com
  John D. Polstra & Co., Inc.                        Seattle, Washington USA
  "Disappointment is a good sign of basic intelligence."  -- Chögyam Trungpa



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