[css-values] Define <'property-name'> notation to exclude listification #3146
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I like this suggestion. This would exclude things like |
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I think this would let us avoid the following productions in css-animations: |
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The CSS Working Group just discussed
The full IRC log of that discussion<dael> Topic: Define <'property-name'> notation to exclude listification<dbaron> fantasai, does that handle stuff like repeating lists? <dael> github: https://github.com//issues/3146 <fantasai> https://drafts.csswg.org/css-values-4/#combining-values <fantasai> dbaron, yes <dael> fantasai: This is an issue about our notation syntax. <dael> fantasai: In CSS 2 we didn't have list valued properties of font-family. There was a convenience location where you could do name of property in quotes and a angle bracket and it ment use this whole property overthere. <dael> fantasai: There's a ton of specs where in CSS2 we could use that notation. We have to creat non-termal terms that are identical to another property except they're not comma sep lists. <dael> fantasai: Means property defintions are more obscure. When you look at table rather then listing color and then repeating there's a new type <dael> fantasai: I think it would be nice to use this notation. We have to unlistify it in order to use it. <dael> fantasai: I was thinking it might make sense to redefine as the property's value space but if it has a top level hash multiplier we remove it and take the value space within each item <dael> fremy: Makes a lot of sense. Reasonable <dael> fantasai: Notation change so it's editorial <dael> florian: Makes sense to me as well <dael> Rossen_: Other opinions? <dael> Rossen_: Objections? <tantek> +1 <fantasai> Redefine <'property-name'> to strip off top-level # multiplier <dael> RESOLVED: Redefine <'property-name'> to strip off top-level # multiplier |
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…lier so it's actually usable with list-valued property patterns. #3146
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The CSS property definition syntax has the handy
<'property-name'>notation, which imports the entire value space of that property (aside from the CSS-wide keywords).It's super useful, except a large number of places where we would use it (and did in CSS2) are places where we've listified the property value. This results in a lot of custom non-terminal grammar productions which are simply the entire value space of the property except without the listification, e.g. in css-backgrounds and css-animations.
I suggest we define
<'property-name'>to just drop top-level listification. This would allow us to clean up our grammar productions, getting rid of these routine non-terminals and inlining a large number of simple productions into the property definition tables where they are easier to see and index.The text was updated successfully, but these errors were encountered: