My best guess is Java. Edit: I guess if you've never seen that this is, uh, controversial. Or something. Anyway, Java enums are full-strength classes, look at

My best guess is Java. Edit: I guess if you've never seen that this is, uh, controversial. Or something. Anyway, Java enums are full-strength classes, look at the planet example here https://docs.oracle.com/javase/tutorial/java/javaOO/enum.html https://docs.oracle.com/javase/tutorial/java/javaOO/enum.htm... This is more like a Rust enum than a C one, I think you'll find.