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;
}
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;
}