I understood and agree with everything (or close enough) until your last:
On Tue, Jan 20, 2015 at 7:20 PM, Brendan Eich <bren...@mozilla.org> wrote:
> ISTM we need more definite consensus on branding to finish off toStringTag
> in ES6.
What we don't have is an inter-realm extensible branding mechanism.
* typeof, Array.isArray, the ES5-compatible subset of O.p.toString.call's
behavior are inter-realm branding, but not extensible.
* === and WeakMap provide extensible branding, but not in a way that is
usable inter-realm.
* the rest of O.p.toString.call's behavior, i.e., the toStringTag
mechanism, is an inter-realm extensible labeling mechanism, but isn't a
branding mechanism.
Does the last bullet unask your question, or have I misunderstood?
--
Cheers,
--MarkM
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