Ah, I see. Hm. I might be interested in a C API since that could be used in C, C++, and Lua equally well. I really was just wondering what the common implementation between the bindings was since it struck me as unusual that there would be a number of bindings but not C (which is AIUI the only interface besides Rust that Rust can really export.)
So, I am not the one that is doing the bindings, so take this with a grain of salt.
It seems uniffi does create C compatible bindings in order to make bindings for all these other languages. But these are internal bindings that are ugly and not intended to be used externally.
Perhaps if an issue were opened describing the necessary steps to provide a fluent and stable C API, staying consistent with the uniffi approach you're using for the other wrappers, then someone enterprising could pick up the ball and run with it. :)
These were the most asked for bindings (python for ml, golang for networking and swift for ios apps).
We are using uniffi https://mozilla.github.io/uniffi-rs/
Would you need C or C++ bindings?