gistfile1.txt

// Source: https://estada.ch/2020/9/23/my-rust-2021-wishlist-for-the-2021-roadmap/#adl

#[derive(Debug)]
pub enum SecondaryProcessor {
    Opening(String),
    Ready,
    Writing(String),
    Reading(String),
    Closing,
}

fn main() {
    use SecondaryProcessor::*;

    let s = Ready;
    match s {
        Opening(string) => { println!("Opening: {}", string); }
        Ready | Closing => { println!("Ready or Closing"); }
        others => { println!("{:?}", others); }
        _ => { println!("/* do something */"); }
    }
}

Run it on play.rust-lang.org