- From: Ian Hickson <ian@hixie.ch>
- Date: Sat, 20 Jun 2009 06:48:37 +0000 (UTC)
- To: Cameron McCormack <cam@mcc.id.au>
- Cc: WebApps WG <public-webapps@w3.org>
- Message-ID: <Pine.LNX.4.62.0906200646490.16244@hixie.dreamhostps.com>
On Sat, 20 Jun 2009, Cameron McCormack wrote: > Cameron McCormack: > > > Done: > > > > > > The value of the internal [[Class]] property of a host object is > > > determined as follows: > > > * If the host object implements a single interface, then the value > > > of the internal [[Class]] property MUST be the identifier of > > > that interface. > > Ian Hickson: > > I think it would make sense to exclude [NoPrototypeObject] interfaces from > > consideration here. > > I assume you mean [NoInterfaceObject]? Is the reasoning for this that > [NoInterfaceObject] inerfaces are nearly always “mixins”, and so > shouldn’t affect the [[Class]]? Yes and yes. > Cameron McCormack: > > > Note that this still technically does not mean you can guarantee that > > > the NodeList returned by querySelectorAll() has [[Class]] == "NodeList", > > > since it could be that that host object implements another interface, > > > which might be required by another spec, or perhaps just because the > > > implementation wants to. > > Ian Hickson: > > IMHO this is a problem. I don't think that UA extensions should affect the > > [[Class]], and I think that other specs should have a way (e.g. > > [NoPrototypeObject]) of always making sure they don't affect the [[Class]] > > of existing stuff. > > Do you still think it would be bad to use [ProtoypeRoot] on interfaces > like NodeList, to indicate that it is the “main” interface? That > would be the way, currently, to require a particular [[Class]] that > could not be overridden by having a second interface be implemented. I don't really mind exactly what the solution is; my only concern here would be that I'd be throwing [PrototypeRoot] around a lot. (I assume with PrototypeRoot that the most-derived interface that inherits from such an interface is automatically promoted to being the [[Class]]?) -- Ian Hickson U+1047E )\._.,--....,'``. fL http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,. Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
Received on Saturday, 20 June 2009 06:49:15 UTC