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
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