W3C home > Mailing lists > Public > www-style@w3.org > January 2012

Re: What is "S" in CSS grammar?

From: Anton Prowse <prowse@moonhenge.net>
Date: Sun, 08 Jan 2012 21:06:55 +0100
Message-ID: <4F09F75F.1000808@moonhenge.net>
To: www-style@w3.org
CC: "Tab Atkins Jr." <jackalmage@gmail.com>, Peng Yu <pengyu.ut@gmail.com>
On 28/12/2011 00:39, Tab Atkins Jr. wrote:
> On Tue, Dec 27, 2011 at 2:24 PM, Peng Yu<pengyu.ut@gmail.com>  wrote:
>> Hi,
>>
>> http://www.w3.org/TR/CSS2
>>
>> The above document mentioned something link this.
>>
>> hexcolor
>> : HASH S*
>> ;
>>
>> I also see the following. I'm wondering if the following S is the above S.
>>
>> S s|\\0{0,4}(53|73)(\r\n|[ \t\r\n\f])?|\\s
>>
>> I know some of above syntax, but not all. Could anybody help me
>> understand what the above sentence mean?
>>
>> I'm not familiar enough with flex syntax. Sorry for asking a naive question.
>
> The S* you see there comes from Chapter 4.1.1, where it's defined as
> "[ \t\r\n\f]+".
>
> The S definition you've quoted from Appendix G is used in the lexical
> scanner to represent a literal "S" or "s" character (or an escaped
> variant of those two).  I'm not sure if there's a conflict there, or
> if the tokens on the right side of the lexical scanner definitions are
> drawn from a different place from the ones on the left.

Peng, Tab: this is being tracked at 
https://www.w3.org/Bugs/Public/show_bug.cgi?id=15459

Cheers,
Anton Prowse
http://dev.moonhenge.net
Received on Sunday, 8 January 2012 20:07:25 GMT

This archive was generated by hypermail 2.3.1 : Tuesday, 26 March 2013 17:20:48 GMT