- From: L. David Baron <dbaron@dbaron.org>
- Date: Tue, 9 Jul 2013 16:32:01 -0700
- To: Florian Rivoal <florian@rivoal.net>
- Cc: www-style@w3.org
On Monday 2013-07-08 12:35 +0200, Florian Rivoal wrote:
> media_query
> : [ONLY | NOT]? S+ media_type S* [S AND S+ expression ]*
> | expression [ S AND S+ expression ]*
> ;
So you don't want occurrences of "S" without a * or a +, and I think
you also don't want to write the grammar such that you have to read
backwards (e.g., "S* S", which requires working backwards to figure
out which part of the whitespace matches the S*).
So I think it would be better to write:
media_query
: [ONLY | NOT]? S+ media_type [ S+ AND S+ expression ]* S*
| expression [ S+ AND S+ expression ]* S*
;
and then remove the trailing "S*" in expression so that it is:
expression
: '(' S* media_feature S* [ ':' S* expr ]? ')'
;
-David
--
𝄞 L. David Baron http://dbaron.org/ 𝄂
𝄢 Mozilla http://www.mozilla.org/ 𝄂
Received on Tuesday, 9 July 2013 23:32:26 UTC