It would be worthwhile to state that iterators returned by 'built-in' functions always have the "no zombies" property (once done, stays done), even though that can't be enforced on user-supplied iterators. "Be generous in what you accept, rigorous in what you emit." --scott
On Mon, Apr 7, 2014 at 11:47 AM, Allen Wirfs-Brock <[email protected]> wrote: > 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 <[email protected]> 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 > > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > > > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
