[webkit-dev] How to handle Array types in IDL files?

Maciej Stachowiak mjs at apple.com
Wed Aug 26 11:27:29 PDT 2009

On Aug 26, 2009, at 9:26 AM, Sam Weinig wrote:

> Making this JS only for now seems fine.  If we want to enable  
> MessagePorts for other binding languages we can define the mapping  
> ourselves.  For example, for a sequence, the clear mapping for ObjC  
> would be to NSArray*.

I think ultimately we should support the sequence syntax in the  
bindings generator.

  - Maciej

> -Sam
> On Wed, Aug 26, 2009 at 5:03 PM, Drew Wilson <atwilson at google.com>  
> wrote:
> To be more precise, the HTML5 IDL defines the following:
> typedef sequence<MessagePort> MessagePortArray;
> The types above are all MessagePortArray in the spec, not Array. So  
> it seems like the intent is that they should indeed get mapped to a  
> vanilla JS Array.
> I could make these attributes JS-only - that shouldn't be a huge  
> issue since MessagePorts are currently only enabled for JS anyway  
> (MessagePort is an empty interface for ObjC). Is that acceptable? Sam?
> -atw
> On Wed, Aug 26, 2009 at 12:34 AM, Cameron McCormack <cam at mcc.id.au>  
> wrote:
> Maciej Stachowiak:
> > We probably need special support for Web IDL array types in the
> > bindings generator. Sam can probably comment n more detail. As a
> > stopgap, we could make the relevant IDL attributes be JS only. I
> > would check out what Web IDL says about Array - I don't think it's
> > supposed to be reflected as just a vanilla JS Array.
> Currently Web IDL says that when getting an attribute of type
> sequence<T>, a new JS Array object is returned.  For array types,
> T[], a host object with particular [[Get]] and [[Put]] behaviour is
> meant to be used, which makes it similar to a native Array.
> Both of these things are pretty speculative, and could do with review.
> --
> Cameron McCormack ≝ http://mcc.id.au/
> _______________________________________________
> webkit-dev mailing list
> webkit-dev at lists.webkit.org
> http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev

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