[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

--- Comment #6 from Yusuke Suzuki <utatane.tea at gmail.com> ---
(In reply to comment #4)
> cc: Yusuke, what do you recommend doing to implement peeking at next
> iterator values?

I think cloning the user crafted iterator completely is impossible. For example,


function generateIterator() {
    var capturedValue = 0;
    var iterator = {
        [Symbol.iterator]() { return this; }
        next() {
            return { value: capturedValue++, done: false };
        }
    };
    return iterator;
}

In the above case, deeply cloning the given iterator object is not enough.
I'm +1 on console.previewSymbol :)

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