public Object newPlus(int line, int column, Object left, Object right) {
PlusNode node = new PlusNode();
node.setLeft((Node) left);
node.setRight((Node) right);
setPosition(node, line, column);
return node;
}
@Override
public Object visit(PlusNode node) {
StringBuilder sb = new StringBuilder();
sb.append(visit(node.GetLeftChild()));
sb.append(" + ");
sb.append(visit(node.GetRightChild()));
return sb.toString();
}
