github at esdiscuss.org (2013-07-12T02:27:36.903Z)
On Jun 8, 2013, at 1:42 PM, Juan Ignacio Dopazo wrote:
> I'm having trouble understanding the current status of generators. Last time I checked, the standard was what V8 has just implemented:
>
> - Generator objects had next(), send(), throw() and close() methods
> - These methods returned objects with "value" and "done" properties
>
> It seems now that:
>
> - send() and close() are gone
yes, those have been eliminated
> - next(value) seems to be the same as send(value)
yes, next(value) replaces send(value)
> - All methods seem to return the yielded result, not an object with a "value" property
No, yield produces a nextResult object. The last line of the yield runtime semantics in 13.4.1.2 is:
Return the result of GeneratorYield(CreateItrResultObject(value, false)).
Note that a iteration result object is being created and passed to the abstract operation at does the actual context switch.
> So, is StopIteration back? How do we know if a generator is done?
No. via a object that implements the ItrResult (name subject to change) interface as specified in 15.19.1.3
On Jun 8, 2013, at 1:42 PM, Juan Ignacio Dopazo wrote: > Hello, > > I'm having trouble understanding the current status of generators. Last time I checked, the standard was what V8 has just implemented: > > - Generator objects had next(), send(), throw() and close() methods > - These methods returned objects with "value" and "done" properties > > It seems now that: > - send() and close() are gone yes, those have been eliminated > - next(value) seems to be the same as send(value) yes, next(value) replaces send(value) > - All methods seem to return the yielded result, not an object with a "value" property No, yield produces a nextResult object. The last line of the yield runtime semantics in 13.4.1.2 is: Return the result of GeneratorYield(CreateItrResultObject(value, false)). Note that a iteration result object is being created and passed to the abstract operation at does the actual context switch. > > So, is StopIteration back? How do we know if a generator is done? No. via a object that implements the ItrResult (name subject to change) interface as specified in 15.19.1.3 > > Thanks, > Juan > _______________________________________________ > es-discuss mailing list > es-discuss at mozilla.org > https://mail.mozilla.org/listinfo/es-discuss