| abstract class $NR_STACK{T} < $DISPENSER{T} |
|---|
| **** | An abstract stack |
| $DISPENSER{_} | $STR | $CONTAINER{_} | $ELT{_} | $ELT |
| NR_STACK{_} | NR_A_STACK{_} | $STACK{_} | STACK{_} | A_STACK{_} |
| copy: SAME; |
|---|
| **** | Return a copy of the stack |
| elt!: T; |
|---|
| **** | Return the elements in the order in which successive "pop"s would yield them without actually removing the elements |
| is_empty: BOOL; |
|---|
| **** | True if size = 0 |
| pop: T; |
|---|
| **** | Return and remove the topmost element |
| push(elt: T); |
|---|
| **** | Push elt to the top of the stack |
| size: INT; |
|---|
| **** | Number of elements in the stack |
| top: T; |
|---|
| **** | Return the topmost element |
