On Thu, May 10, 2012 at 10:26 AM, Kang-Hao (Kenny) Lu <kennyluck@csail.mit.edu> wrote: > (12/04/24 6:13), Tab Atkins Jr. wrote: >> We propose amending the Core Grammar to make the + and - part of the >> "num" production. This shouldn't have any effect on real pages - we >> highly doubt that any page has actually put a comment between a >> negative sign and the number. > > I'd like to note that if we change this but not the grammar for calc(), > it means that calc(1em + -1em) becomes conforming according to the > grammar. Perhaps it isn't a bid deal because the implementations that > ship already (IE9 and Firefox4+) already support this. That calc expression should be conforming. The calc() grammar has to be adjusted anyway, because it's currently *correctly* including a manual +/- in the "unit" production. We need to remove that. > But the next question is whether we want to change Selectors 3 as it > explicitly forbids :nth(1n + -1) and the like. The nth grammar is broken anyway (noted in a recent thread). When we rewrite the parsing for it, we'll just need to figure out what's sane based on implementations. ~TJReceived on Thursday, 10 May 2012 11:50:53 UTC
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