Rewinding iterators

[Allen Wirfs-Brock]

see https://bugs.ecmascript.org/show_bug.cgi?id=2003 which was the original issue that motivated the currently spec'ed  behavior. 






On Apr 7, 2014, at 3:30 AM, Marcus Stade wrote:

> Thanks for filing that! Now I also know where to file bugs, so doubly thanks!
> 
> -- Marcus
> 
> 
> On Mon, Apr 7, 2014 at 10:00 AM, David Bruant <bruant.d at gmail.com> wrote:
> Le 07/04/2014 02:31, Marcus Stade a écrit :
>> In section 25.1.2 of the spec it says:
>> 
>> The function returns an object that conforms to the IteratorResult interface. If a previous call to the next method of an Iterator has returned an IteratorResult object whose done property is true, then all subsequent calls to the next method of that object must also return an IteratorResult object whose done property is true,
>> 
>> Are there any practical reasons why the Iterator interface explicitly disallows this?
> There is no good reason indeed. Worse, there is no way to enforce it on user-generated iterators, so it'd be dangerous for standard iterator consumers to assume such a property.
> 
> This mention should probably be removed altogether.
> Filed https://bugs.ecmascript.org/show_bug.cgi?id=2606
> 
> Thanks,
> 
> David
> 
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