Rust (and Go) present an interesting challenge to people who have cargo-culted object-orientation. In Rust, data is dumb, and traits (aka 'interfaces') provide

Rust (and Go) present an interesting challenge to people who have cargo-culted object-orientation. In Rust, data is dumb, and traits (aka 'interfaces') provide meaning. So you can go polymorphic with 'trait objects' or monomorphic with trait constraints on generics (i.e don't have to pay for virtual dispatch when it matters). The cool thing is that both languages allow interfaces to be _added_ in consuming code, they're not part of the definition as in Java.