things i think i might be happier not knowing.

[zwol]

In CSS, url() is defined as part of the lexicon, not the grammar. If you write

  .x { background-image: url(  "foo/bar"  ) }

everything from the u up to the close parenthesis is ONE TOKEN. As far as I can tell, the only effect this has on anything is to make it more difficult to implement a CSS parser.

Comments

[graydon.livejournal.com]

"CSS: look, at least it's not as hard to parse as SGML!"

Hmm. Not really the snappy motto you'd hope for.

[zwol.livejournal.com]

I'm trying to decide whether there's anything that would notice if Moz implemented the parser as if the grammar was the way it shoulda been written in the first place: URI becomes a nonterminal defined as

uri : "url" '(' S* [ STRING | URILITERAL ] S* ')'

and URILITERAL is a new terminal that does the unquoted case. There might be a visible change to error recovery, I don't know. Bleah.