use std::fmt;


enum MetaData {
    Webpage { title: String },
    Image { extension: String, resolution: (u64, u64), size: u64 },
    File { extension : String, size: u64 },
}

impl fmt::Display for MetaData {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match *self {
            MetaData::Webpage { title: ref x } => write!(f, "{}", x),
            _ => write!(f, "a")
        }
    }
}

fn main() {

}