@Override
public Expression visit(Optional optional) {
Optional result = new Optional();
if (optional.getExpr().getClass() == Choice.class) {
String name = "opt" + Integer.toString(count);
count++;
Nonterminal nt = new Nonterminal(name);
Expression exp = optional.getExpr().accept(this);
newRules.put(nt, exp);
result.setExpr(nt);
} else {
Expression exp = optional.getExpr().accept(this);
result.setExpr(exp);
}
return result;
}
