[kephasp]

Look for actual examples in the wild that weren't error prone and I'd be surprised you'll find any.

I get that you can imagine it. I'm saying it wouldn't work in practice.

[kadoban]

Searching wide and far for a data structure that's that niche in implementation is not really sensible, I'd probably have to implement one myself. If the sketch above doesn't satisfy you, that's about the end for me. Have a good one.

[kephasp]

You need to sketch it and possibly implement it yourself because actual examples don't exist. QED