#ifndef __NODE
#define __NODE

#include <string>
#include <vector>
#include "token.h"
#include "hashtable.h"

typedef token_type node_type;

class node: public token
{ protected:
    vector <node *> links;

  public:
    node(node_type t, string s, int v);
    static node * var(string s);
    static node * num(int v);
    static node * op(string s);
    static node * err(string s);
    node * add(node * n);
    int getnumlinks();
    node * getlink(int i);
    void print();
    int evaluate(hashtable & mem);
    void print1(int depth = 0);
};

#endif