On Tue, May 7, 2013 at 11:09 AM, Nathan Wall <[email protected]> wrote:
> >> Do you think we can come to some sort of agreement, as discussed below, > >> that [[ProtoSetter]] doesn't need to be realm restricted. Such an > >> agreement would let us write the simplest possible specification of > >> __proto__. > > > > Very timely question. I've discussed this within the other Cajadores > > and the answer is yes. While the range restriction help security in > > some ways, it doesn't help a lot, and it actually hurts in other > > ways. Such simplicity itself is of benefit to security, and weighs in > > the overall tradeoff. On balance we're better off without it. I'll be > > posting publicly on this soon. > > ... > > >> It would also remove all obstacles to having Object.setPrototypeOf > >> which a number of vocal community members would really prefer to have > >> built-in and available rather than having to use __proto__ ugliness. > > > > Yes. All objections to this disappear. And likewise for having proxies > > handle trapping proto changes differently from their handling of other > > changes. > > > If I didn't misinterpret, this sounds like a very, very a welcome > discussion -- one for which I would like to restate that I have a real > use-case which is not 100% solvable with realm-confined __proto__[1]. > > I would like to add that, should `setPrototypeOf`, be admitted, it should > work on objects which don't inherit from `Object.prototype` in order to > settle my use-case (and also from a purist's point of view of how the > language should behave). If `setPrototypeOf` is not admitted, I would hope > that at least __proto__ will be a setter which can be retrieved with > `getOwnPropertyDescriptor` and applied to objects which don't inherit from > `Object.prototype`. > Agreed on both. The only restriction we need is the one that ES5 already gives us: You can't change the [[Prototype]] of a non-extensible object. > > Please keep up the discussions around this issue! > > > > [1] https://mail.mozilla.org/pipermail/es-discuss/2013-March/029329.html > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > -- Text by me above is hereby placed in the public domain Cheers, --MarkM
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