use std::collections::HashMap;

#[derive(Debug)]
pub enum Toto {
    Bli,
    Bla,
    Top
}

type Env = HashMap<String, Toto>;

fn get(key: &String, e: &Env) -> Toto {
    match e.get(key) {
        Some(t) => {
            let x = t.clone();
            x // x has type &Toto instead of the expected(?) Toto
              // if Toto derives Clone, then x has type Toto, as expected
        },
        None => Toto::Top
    }
}

fn main() {
    println!("Hello, world!");
}