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Re: [css3-mediaqueries] grammar unspecified?

From: Anne van Kesteren <annevk@opera.com>
Date: Wed, 04 Mar 2009 10:38:54 +0900
To: "Andrey Mikhalev" <amikhal@abisoft.spb.ru>
Cc: www-style@w3.org
Message-ID: <op.up8uuzus64w2qv@annevk-t60.oslo.opera.com>
On Thu, 26 Feb 2009 01:36:22 +0900, Andrey Mikhalev  
<amikhal@abisoft.spb.ru> wrote:
> "good approximation" which produce yacc syntax error?
> suggest only one basic grammar should be used to define syntax, not both.
> e.g.
> expression
>   : '(' S* media_feature S* [':' S* expr]? ')' S*

Yeah, you're right, that would actually work. For some reason I thought it  
would not work, but that is not true. Having said that, you cannot  
generate CSS parsers from just the CSS grammar.


>>> btw, generic value ("[ any | block | ATKEYWORD S* ]+") looks like  
>>> overkill for mediaquery expressions listed in spec.
>>
>> We could restrict it I suppose, it does not really matter either way as  
>> far as I can tell...
>
> thin ice of another issue.
> css generic grammar allow only one [nested] block per at-rule...

Fair enough.


-- 
Anne van Kesteren
<http://annevankesteren.nl/>
<http://www.opera.com/>
Received on Wednesday, 4 March 2009 01:39:42 GMT

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