Cell.hpp

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#ifndef CELL_HPP
#define CELL_HPP

#include <cstddef>
#include <cstdlib>
#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <stack>

using namespace std;

class Cell {
public:

  Cell(const int i);

  Cell(const double d);

  Cell(const char* const s);

  Cell(Cell* const my_car, Cell* const my_cdr);

  bool is_int() const;

  bool is_double() const;

  bool is_symbol() const;

  bool is_cons() const;

  int get_int() const;

  double get_double() const;

  string get_symbol() const;

  Cell* get_car() const;

  Cell* get_cdr() const;

  void print(ostream& os = cout) const;

private:

  string sexpr_m;

};

// Reminder: cons.hpp expects nil to be defined somewhere (for this
// implementation, Cell.cpp is the logical place to define it).
// Here we promise this again, just to be safe.
extern Cell* const nil;

#endif // CELL_HPP

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