fmt.rs

enum PlayerError {
  InvalidCodec(String), 
  InvalidMedia,
}
 
impl std::fmt::Display for PlayerError {
  fn fmt(&self, f: &mut std::fmt::Formatter) -> Result<(), std::fmt::Error> {
    use self::PlayerError::*;
    let s = match *self {
      InvalidCodec(ref s) => format!("Invalid codec: {}", s).clone(),
      InvalidMedia => String::from_str("Unable to decode media"),
    };
    std::fmt::Display::fmt(s.as_slice(), f)
  }
}
 
fn main() {}