#ifndef VARIABLEMAP
#define VARIABLEMAP

#include <map>
#include <vector>
#include <string>
#include "node.h"
/**
 *Variable Map is a class to store the variables used throughout the program.
 *The values are stored as ints, this way they are not affected by changes to
 *other variables. They are stored as a vector, so that later implementations
 *might allow for looking up old values.
 *
 *CONSTRUCTOR
 *VariableMap()
 *
 *MEMBER FUNCTIONS
 *
 *double lookUpVar(const string & variable)
 *        Looks up the varaible and returns its last entered Node * value
 *        Returns 0 if not there
 *
 *void upDateVariables(const string & variable, const Node * & value)
 *        Updates the variable's value and prints out the latest value
 *
 *bool checkForVar(const string & line,const int &k)
 *        Checks to see if line is in the map returns true if it is
 *
 *
 *PRIVATE VARIABLES
 * VariableList myVariables
 *          Holds current varaibles 
 *Written by Jessica Smith
 */
class VariableMap{

  public:
    typedef map<string,vector<Node *> >VariableList;
    typedef pair<string,vector<Node *> >VariablePair;
    VariableMap();
     Node * lookUpVar(const string & variable);
    void upDateVariables(const string & variable,  Node * & value);
    bool checkForVar(const string & line, const int& k);
  private:
    VariableList myVariables;
};

#endif VARIABLEMAP