WeakSet may or may not happen by ES6. But even if it doesn't, WeakSet is trivially shimmable on WeakMap.
WeakRef will definitely not happen earlier than ES7. I do hope it will happen in ES7, but this discussion has yet to happen. On Tue, Mar 26, 2013 at 4:30 PM, Sam Tobin-Hochstadt <[email protected]>wrote: > On Tue, Mar 26, 2013 at 12:28 PM, Rick Waldron <[email protected]> > wrote: > > > > > > > > On Tue, Mar 26, 2013 at 12:23 PM, Domenic Denicola > > <[email protected]> wrote: > >> > >> From: Rick Waldron [[email protected]] > >> > >> > TC39 reached consensus on the inclusion of WeakSet, though it needs to > >> > be designed: > >> > > >> > > https://github.com/rwldrn/tc39-notes/blob/master/es6/2012-09/sept-19.md#weakset > >> > >> Is this ES6 timeframe, or ES7? I have run into a few use cases for it > >> since hearing this, and was hoping it was on-track. > > > > > > The discussion immediately preceding that discussion indicates that > WeakSet > > will be a requirement of Proxy: > > > > > https://github.com/rwldrn/tc39-notes/blob/master/es6/2012-09/sept-19.md#proxy-and-private-names > > Note that this requirement is conditional on a particular approach > (which I still favor) to the interaction between proxies and private > names, and so since that's still up in the air, the WeakSet > requirement for ES6 may go away. > > Sam > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > -- Cheers, --MarkM
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