first attempt on Rust

first_attempt.rs

enum IPAddr {
    IPv4(u8, u8, u8, u8),
    IPv6(String),
}

fn main() {
    let ip1 = IPAddr::IPv4(127, 0, 0, 1);
    let ip2 = IPAddr::IPv6(String::from("::1"));
    print_ip(&ip1);
    print_ip(&ip2);
}

fn print_ip(ip: &IPAddr) {
    match ip {
        IPAddr::IPv4(a, b, c, d) =>
            println!("IPv4: {}.{}.{}.{}", a, b, c, d),
        IPAddr::IPv6(ip) =>
            println!("IPv6: {}", ip),
    }
}