public interface ASTVisitor<T> {
    T visit(Objectid id);
    T visit(Typeid id);
    T visit(Int intt);
    T visit(My_string string);
    T visit(Bool bool);
    T visit(Paren paren);
    T visit(Not not);
    T visit(Equal equal);
    T visit(Lowerequal lowerequal);
    T visit(Lowerthan lowerthan);
    T visit(Neg neg);
    T visit(Div div);
    T visit(Mult mult);
    T visit(Diff diff);
    T visit(Add add);
    T visit(Isvoid isVoid);
    T visit(New neww);
    T visit(Case casee);
    T visit(Let let);
    T visit(Block block);
    T visit(While whilee);
    T visit(If iff);
    T visit(FunctionCall functionCall);
    T visit(DynamicDispatch dynamicDispatch);
    T visit(Assign assign);
    T visit(Formal formal);
    T visit(FuncDef funcDef);
    T visit(VarDef varDef);
    T visit(My_class my_class);
    T visit(Program program);
}