Le 05/10/2012 17:23, Mark S. Miller a écrit : > On Fri, Oct 5, 2012 at 7:11 AM, Sam Tobin-Hochstadt <[email protected] > <mailto:[email protected]>> wrote: > > > Note also that `Symbol.for` has some really weird behavior. For > example, what does this evaluate to? > > Symbol.for("x") instanceof Symbol > > That depends if someone has previously evaluated `Symbol.for("x")` in > a different frame. > > > > If this is true, then it is obviously a fatal problem with the whole > proposal, independent of all other issues. Do symbols have a > [[Prototype]] whose value is a Symbol.prototype? Or more "profoundly", are symbols Objects (in the ES5.1 - 8.6 section sense) at all or just lightweigh representations of object identities?
David
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