Traits in Rust

trait Greet {
    fn greet(&self) -> String;
}

struct EnglishGreeter;

impl Greet for EnglishGreeter {
    fn greet(&self) -> String {
        // TODO: "Hello!".to_string()
    }
}

fn main() {
    let g = EnglishGreeter;
    println!("{}", g.greet());
}