Enums

Rust follows F#, Haskell pattern

Enums

Enums are really peculiar in Rust. For instance below is a valid enum

fn main() {
    let address = Test::V6(String::from("::1"));

    println!("{:?}", address);
}

#[derive(Debug)]
enum Test {
    V4,
    V6(String),
}

As you could see above, enums could hold different values.

Null Values

There is no null value in Rust. Keep this in mind. Instead you could use pre-build enums from the standard library like Option<T> or Result<T, Error>