trpl-zh-cn/listings/ch06-enums-and-pattern-matching/no-listing-02-enum-with-data/src/main.rs

fn main() {
    // ANCHOR: here
    enum IpAddr {
        V4(String),
        V6(String),
    }

    let home = IpAddr::V4(String::from("127.0.0.1"));

    let loopback = IpAddr::V6(String::from("::1"));
    // ANCHOR_END: here
}