Include column information into synctex?

[user202729]

I think this is not too difficult, the (1-indexed) column can be computed as loc - start + 1 provided state != token_list.

I already have a proof of concept implementation at user202729/luatex@synctex-column , which appears to work reasonably for simple documents.

I'd like to ask:

• is there sufficient interest in this idea?

• while I implement this, I don't really understand the memory layout, which leads to me packing the line and column into a single int like a bit mask. This leads to a limitation of file length less than $2^{24}$ lines and column less than $2^8$.

  How can I modify the memory layout to add an extra field column into the box?