linux-kernel - Re: [RFC][PATCH] A generic boolean (version 4)

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Date:	Sun, 23 Jul 2006 23:17:52 +0200 (MEST)
From:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
To:	Jeff Garzik <jeff@...zik.org>
cc:	ricknu-0@...dent.ltu.se, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...l.org>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Vadim Lobanov <vlobanov@...akeasy.net>,
	Shorty Porty <getshorty_@...mail.com>,
	Peter Williams <pwil3058@...pond.net.au>,
	Michael Buesch <mb@...sch.de>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Stefan Richter <stefanr@...6.in-berlin.de>, larsbj@...lik.net
Subject: Re: [RFC][PATCH] A generic boolean (version 4)

>> > +#define false false
>> > +#define true true 
>> 
>> Can someone please tell me what advantage 'define true true' is going to
>> bring, besides than being able to '#ifdef true'?
>
> It
>
> (a) makes type information available to the C compiler, where a plain #define
> does not.

Do you mean preprocessor? C already knows about true from the enum.

> (b) handles all '#ifndef true' statements properly

Holy *, is there _really_ code in linux/ that depends on true being 
[not] defined?


Jan Engelhardt
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