push(new EnumerationNode(pop()));
break;
case MINUSMINUS:
op = jj_consume_token(MINUSMINUS);
UnaryExpression();
push(new PrefixDecrementNode(toLocation(op), pop()));
break;
case PLUSPLUS:
op = jj_consume_token(PLUSPLUS);
UnaryExpression();
push(new PrefixIncrementNode(toLocation(op), pop()));