👍 ... did you see this https://github.com/leutloff/diff-match-patch-cpp-stl/blob/aee799a31d08977b166fb19cad794730717e3304/README.md#diff-match-patch-cpp-stl too?
This was by @leutloff based on code from Sergey Nozhenko

Thanks, his STL port more like a rewrite, my port just remove the QT dependency:)

https://github.com/QuentinFiard/diff_match_patch, this one do same thing as my work, I should search more before jump in

@stonewell both are inactive and a tad old... (this is other fork of the port your found is a tad more advanced... https://github.com/udif/diff_match_patch ) BUT you are active!
So you could use these as inspiration, but please do not stop your work: you are doing great.

+1

std::variant is C++17, C++11 would be nice