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Subject: Re: [RFC][PATCH] A generic boolean (version 6)
From: Nicholas Miell <nmiell@comcast.net>
To: ricknu-0@student.ltu.se
Cc: Arnd Bergmann <arnd.bergmann@de.ibm.com>, linux-kernel@vger.kernel.org,
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Date: Thu, 27 Jul 2006 13:13:59 -0700
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On Thu, 2006-07-27 at 21:55 +0200, ricknu-0@student.ltu.se wrote:
> Citerar Nicholas Miell <nmiell@comcast.net>:
> 
> > If _Bool does end up in the user-kernel ABI, be advised that validating
> > them will be tricky ("b == true || b == false" or "!!b" won't work), and
> 
> Why would !!b not work?
> I don't think it should end up in the ABI (at least, not yet). Just asking
> because I'm curious. :)
> 

The compiler knows that "b = !!b;" is a no-op.

-- 
Nicholas Miell <nmiell@comcast.net>