fn is_double(&self) -> bool {
        match *self {
            Item::Long(_) | Item::Double(_) => true,
            _ => false,
        }
    }
/// Returns true if this item takes up two spaces, false otherwise.
Returns true if this item takes up two spaces, false otherwise.
Returns true if this item takes up two spaces false otherwise .
fn is_double(&self) -> bool {
        match *self {
            Item::Long(_) | Item::Double(_) => true,
            _ => false,
        }
    }
fn is_double ( & self ) -> bool { match * self { Item :: Long ( _ ) | Item :: Double ( _ ) => true , _ => false , } }
Returns true if this item takes up two spaces, false otherwise.
Returns true if this item takes up two spaces false otherwise .
&self