Default empty check. Can be overridden in subclass for performance.
| 553 | virtual int size() const = 0; |
| 554 | // Default empty check. Can be overridden in subclass for performance. |
| 555 | virtual bool empty() const { return size() == 0; } |
| 556 | |
| 557 | virtual ~CelList() {} |
| 558 |