If you want a particularity cursed example, I've recently called Go code from Rust via C in the middle, including passing a Rust closure with state into the Go

If you want a particularity cursed example, I've recently called Go code from Rust via C in the middle, including passing a Rust closure with state into the Go code as callback into a Go stdlib function, including panic unwinding from inside the Rust closure https://github.com/Voultapher/sort-research-rs/commit/df6c91c664f262f69061cb45d4520d0df295610c https://github.com/Voultapher/sort-research-rs/commit/df6c91....