This is neat. I'm not a swift user, but I did work on a project where we made heavy use of JInterface (which ships in OTP), which is effectively the same thing

This is neat. I'm not a swift user, but I did work on a project where we made heavy use of JInterface (which ships in OTP), which is effectively the same thing but for JVM languages. It worked great and allowed easy reuse of a bunch of Java libraries we already had. Pretty painless interop model, imo.