/// Yields true, if the queue is empty
Yields true, if the queue is empty
Yields true if the queue is empty
pub fn empty(&self) -> bool
    {
        let first = self.peek();
        if let Err(e) = first
        {
            return e == QueueErr::Empty;
        }
        return false;
    }
pub fn empty ( & self ) -> bool { let first = self . peek ( ) ; if let Err ( e ) = first { return e == QueueErr :: Empty ; } return false ; }
Yields true, if the queue is empty
Yields true if the queue is empty
&self