[Webkit-unassigned] [Bug 152682] Web Inspector: Show upcoming values of non-native iterators

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=152682

Brian Burg <bburg at apple.com> changed:

           What    |Removed                     |Added
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                 CC|                            |utatane.tea at gmail.com

--- Comment #4 from Brian Burg <bburg at apple.com> ---
(In reply to comment #3)
> (In reply to comment #2)
> > I think this could backfire if the iterators are not side effect-free. We
> > can always do this for native iterators because we know how they are
> > implemented.
> 
> Correct!
> 
> > Perhaps we could hide it behind the getter "eyeball button".
> 
> Even this might be difficult. We may need to have some way to duplicate an
> iterator, as peeking forward will actually advance the iterator and we can't
> advance the actual iterator without then breaking execution.
> 
> --
> 
> An entirely alternative solution would be allowing developers to provide
> their own previews for their own objects. See:
> <https://webkit.org/b/142656> Web Inspector: Expose a way for developer
> provided object previews

If they use iterators, why are they going to have any less trouble duplicating the iterator state than we are?

cc: Yusuke, what do you recommend doing to implement peeking at next iterator values?

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