#[derive(Debug)]
enum Hello {
    Bonjour,
    Nihao
}

trait SayHello<T> {
    fn hello(action: &str) -> Result<T, &'static str> ;
}

impl SayHello<Hello> for Hello {
    fn hello(action: &str) -> Result<Hello, &'static str>  {
        match action {
            "bonjour" => Ok(Hello::Bonjour),
            "nihao" => Ok(Hello::Nihao),
            _ => Err("lol")
        }
    }
}


fn main() {
    println!("Hello, world!");
    let hello = Hello::hello("nihao");
    println!("ntm {:?}", hello)
}