I won't do this justice, so I'll point you to the Rust book on this subject: https://doc.rust-lang.org/book/second-edition/ch19-01-unsafe-rust.html#using-extern

I won't do this justice, so I'll point you to the Rust book on this subject: https://doc.rust-lang.org/book/second-edition/ch19-01-unsafe-rust.html#using-extern-functions-to-call-external-code https://doc.rust-lang.org/book/second-edition/ch19-01-unsafe... In short, at the moment, if you want a stable ABI, you must export an un_mangled C interface. This is easy enough. One of my favorite sites is this for FFI stuff: http://jakegoulding.com/rust-ffi-omnibus/ http://jakegoulding.com/rust-ffi-omnibus/ It covers a bunch of languages, and suggests techniques for overcoming any complexity in exposing higher order types.