Brendan Eich wrote:
I’ve tried various formulation of a simple statement about host
objects but I keep finding potential holes and coming back to the
conclusion that the only meaningful thing to do is to explicitly
enumerable the invariants associated with each predefined [[Class]]
value. Does anybody have a simpler solution? Does anybody want to
volunteer to identify the invariants?
I think Chapter 15 already does identify the invariants, but you're
right that multiple globals are not specified. In a single-global
embedding, I would want any host [[Class]] == "Array" impostor to create
instances whose prototype was Array.prototype, though. Wouldn't you?
Not necessarily. Array.prototype could be further up the prototype chain, or
perhaps they could share a common prototype that constitutes a more generic
kind of arrayness than Array.
As you guys mentioned, the bigger question is what to do about multiple global
objects. That's the issue in reality and we shouldn't add anything to the spec
that would be inconsistent with that reality.
Waldemar
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