[PATCH 8/9 V3] Add documentation for the new DTS language.
M. Warner Losh
imp at bsdimp.com
Fri Oct 3 11:17:05 EST 2008
In message: <20081003002337.GB3002 at yookeroo.seuss>
David Gibson <david at gibson.dropbear.id.au> writes:
: On Thu, Oct 02, 2008 at 01:50:04PM -0600, M. Warner Losh wrote:
: > In message: <20081002152242.GB22258 at ld0162-tx32.am.freescale.net>
: > Scott Wood <scottwood at freescale.com> writes:
: > : On Thu, Oct 02, 2008 at 11:18:00AM +1000, David Gibson wrote:
: > : > > I vote against anything similar to the C preprocessor.
: > : >
: > : > Why?
: > :
: > : It's not nearly as powerful as the semantic approach, and it is
: > : syntactically clumsy (I do *not* want to have to put a backslash at the
: > : end of every line within a macro, for example).
: >
: > And there are no looping constructs at all in CPP. You flat out can't
: > do a generalized for loop with the macro language, for example. Its
:
: But we can put looping constructs into the expression support which
: macros can then use.
:
: > symbols also do not map 1-1/onto symbols used by the dts files. It
: > can only grok macros you define for it, so it has no way of knowing
: > many useful things that dts just knows.
:
: Uh.. I'm not sure what you mean by this.
I mean that identifiers have # in them in the dts language. cpp deals
with identifiers that are similar to, but not the same thing as dts.
Warner
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