From: Scott Wood <scottwood-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
To: David Gibson <david-xT8FGy+AXnRB3Ne2BGzF6laj5H9X9Tb+@public.gmane.org>
Cc: "devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org"
<devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org>
Subject: Re: [PATCH v2] dtc: Add support for named integer constants
Date: Wed, 28 Sep 2011 11:08:02 -0500 [thread overview]
Message-ID: <4E834662.4010907@freescale.com> (raw)
In-Reply-To: <20110928002942.GE5361-787xzQ0H9iQXU02nzanrWNbf9cGiqdzd@public.gmane.org>
On 09/27/2011 07:29 PM, David Gibson wrote:
> On Tue, Sep 20, 2011 at 12:35:29PM -0500, Scott Wood wrote:
>> Another disadvantage of any approach that tries to separate macros from
>> the underlying language is that you can't have anything be conditional
>> on an expression that the macro layer doesn't understand.
>
> That one doesn't follow, actually. The macro can't implement a
> conditional itself, but it could expand to a (constant) conditional
> expression which is evaluated later.
Right, you can always implement conditionals in the underlying language,
but the macro processor can't directly use the results. This can be an
issue if the intended use is to be heavily reliant on macros as a
substitute for expressiveness in the underlying language.
-Scott
prev parent reply other threads:[~2011-09-28 16:08 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-30 21:30 [PATCH v2] dtc: Add support for named integer constants Stephen Warren
[not found] ` <1314739818-13904-1-git-send-email-swarren-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2011-09-02 18:34 ` Stephen Warren
[not found] ` <74CDBE0F657A3D45AFBB94109FB122FF04B327A62D-C7FfzLzN0UxDw2glCA4ptUEOCMrvLtNR@public.gmane.org>
2011-09-08 13:09 ` Simon Glass
[not found] ` <CAPnjgZ0NzN510XJZ1ONAbMTS3vrrP8qCV8NYHq4_heZL+PizNg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-09-08 13:18 ` Simon Glass
[not found] ` <CAPnjgZ0gUvPSbVb+2+ohmDrqgYukb7+JQKY6P4C_mY0QGp83Gg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-09-09 1:35 ` David Gibson
[not found] ` <20110909013521.GD21002-787xzQ0H9iQXU02nzanrWNbf9cGiqdzd@public.gmane.org>
2011-09-09 3:27 ` Simon Glass
2011-09-08 18:32 ` Grant Likely
[not found] ` <20110908183211.GM2967-e0URQFbLeQY2iJbIjFUEsiwD8/FfD2ys@public.gmane.org>
2011-09-08 18:38 ` Simon Glass
2011-09-09 1:34 ` David Gibson
[not found] ` <20110909013433.GC21002-787xzQ0H9iQXU02nzanrWNbf9cGiqdzd@public.gmane.org>
2011-09-19 22:13 ` Stephen Warren
[not found] ` <74CDBE0F657A3D45AFBB94109FB122FF04B732144F-C7FfzLzN0UxDw2glCA4ptUEOCMrvLtNR@public.gmane.org>
2011-09-20 8:04 ` David Gibson
[not found] ` <20110920080409.GL29197-787xzQ0H9iQXU02nzanrWNbf9cGiqdzd@public.gmane.org>
2011-09-20 13:48 ` Jon Loeliger
[not found] ` <E1R60g6-0002XP-Pt-CYoMK+44s/E@public.gmane.org>
2011-09-20 17:02 ` Stephen Warren
2011-09-20 17:35 ` Scott Wood
[not found] ` <4E78CEE1.3090403-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
2011-09-28 0:29 ` David Gibson
[not found] ` <20110928002942.GE5361-787xzQ0H9iQXU02nzanrWNbf9cGiqdzd@public.gmane.org>
2011-09-28 16:08 ` Scott Wood [this message]
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