play.rs

#[derive(Debug)]
enum Lx {
    Str(String),
    Int(String),
    Keyword(String),
    LxUnk(char),
}

fn main() {   

    let mut v: Vec<Lx> = vec![];

    v.push(Lx::Str("test".to_string()));
    v.push(Lx::Int("124".to_string()));
    v.push(Lx::Keyword("print".to_string()));
    v.push(Lx::Str("test".to_string()));

    for x in &v {
        let s = match *x {
            Lx::Str(ref c) => &c[..],
            Lx::Int(ref c) => &c[..],
            Lx::Keyword(ref c) => &c[..],
            _ => "",
        };
        println!("{:?}", s);
    }
}