On Mon, Jul 19, 2010 at 1:49 PM, Allen Wirfs-Brock < allen.wirfs-br...@microsoft.com> wrote:
> > -----Original Message----- > > From: Mark S. Miller [mailto:erig...@google.com] > ... > > Is the following one of those cases: > > > > > The value of the [[Class]] internal property of a host object > > > may be any String value except one of "Arguments", "Array", > > > "Boolean", "Date", "Error", "Function", "JSON", "Math", "Number", > > > "Object", "RegExp", and "String" > > > > Yes. As you said in an earlier message, the intent was that the host should > environment should not violate specification of the nominal "types" used by > the specification. But certainly, a host environment could produce such > values and even management them differently as long as it doesn't violate > any the semantics for that "type" that appear in the ES5 spec. > > > If so, then I think we may simply have a term rotation. Everytime I say > "host > > object", and AFAICT every time the spec says "host object" other than the > > definition (4.3.8), both I and it mean what you refer to above as a > "non-native > > host object". Also, by your clarification above, a "native host object" > seems > > indistinguishable from any other "native object", so I'm not sure what > purpose > > the distinction has. > > > Yes, I agree. I think the main "bug" in this regard in the spec. in that > the definition in 4.3.8 does not clarify this distinction. But note that > 4.3.6 is quite clear that a native object is /any/ object whose semantics > are fully defined by the ES5 specification and the note to 4.3.8 says that > any object that is not native (ie whose semantics are not fully defined by > the ES5 specification) is a host object. The only host objects that the > spec. needs to explicitly talk about are host objects that are not native > objects. > > > In any case, we clearly have a disagreement about our memory of what we > took > > these terms to mean. Anyone else who was there, care to weigh in? > > > Do we?? What do you think "host object" means? > Objects that are not native objects. I.e., the categories are disjoint and Garrett's isHostObject method is correct. > > > Allen > _______________________________________________ > es5-discuss mailing list > es5-disc...@mozilla.org > https://mail.mozilla.org/listinfo/es5-discuss > -- Cheers, --MarkM
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