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Date: Thu, 30 Aug 2001 19:34:49 -0700
From: Andy Chou <acc@CS.Stanford.EDU>
To: "Peter T. Breuer" <ptb@it.uc3m.es>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [IDEA+RFC] Possible solution for min()/max() war
Message-ID: <20010830193449.A18366@Xenon.Stanford.EDU>
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How about:

#define AssertNow(x) switch(1) { case (x): case 0: }

as in:

AssertNow(sizeof(typeof(x)) == sizeof(typeof(y)));

I'm not sure if gcc optimizes this away, but it would be easy for someone
to find out.

I didn't invent this.

-Andy


> And I was hoping that somebody could produce some gcc magic
> replacement for BUG() that means "don't compile me". Perhaps
> a bit of illegal assembler code with a line reference in?
> Surely gcc must have something like __builtin_wont_compile()?
> It just needs to be a leaf of the RTL that evokes a compile error.