pub fn is_empty(&self) -> bool {
        match self.inner {
            Empty => true,
            Normal(..) => false,
        }
    }
/// Determines if this range is the empty range.
Determines if this range is the empty range.
Determines if this range is the empty range .
pub fn is_empty(&self) -> bool {
        match self.inner {
            Empty => true,
            Normal(..) => false,
        }
    }
pub fn is_empty ( & self ) -> bool { match self . inner { Empty => true , Normal ( .. ) => false , } }
Determines if this range is the empty range.
Determines if this range is the empty range .
&self
&self