value.h

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#ifndef VALUE_H
#define VALUE_H

#include <qstring.h>
#include <qimage.h>
#include <vector>
#include "Data/om-data.h"

using namespace std;

class Value;
class Variable;
class Reference;
class TextValue;
class Range;

class Value
{
 public:
  virtual ~Value() {};
  virtual QString toString() = 0;
  bool equals(Value *other);
  bool equals(Value &other) 
    {
      return equals(&other);
    };
  void print() 
    {
      printf("%s\n",(const char*)toString());
    };
  virtual Data getSaveDescription(QString prefix) = 0;
  static Value * load(Data from);
 protected:
  virtual bool equals_same_type(Value * other) = 0;
};

class Expression: public Value
{
 private:
  vector<Value*> values;
  QString operat;
 public:
  virtual Data getSaveDescription(QString prefix);
  Expression(QString op) : operat(op) {};
  Expression(Token data);
  void add(Value * n) {values.push_back(n);};
  int argc() {return values.size();}; 
  QString op() {return operat;};
  Value * argv(int i) {return values[i];};
  virtual QString toString();
  virtual bool equals_same_type(Value * other);
};

class ValueArray: public Value
{
 private:
  Value ** values;
 public:
  int sx;
  int sy;
  virtual Data getSaveDescription(QString prefix);
  ValueArray(int x, int y);
  ValueArray(Token data);
  Value* get(int x, int y) { return values[x+y*sx]; };
  void set(int x, int y, Value * v);
  virtual QString toString();
  virtual bool equals_same_type(Value * other);
};

class ValueCopier
{
 protected:
  virtual Reference* copyRef(Reference*vv) = 0;
  virtual Value * copyText(TextValue*vv);
  virtual Value * copyExpr(Expression * expr);
  virtual Value * copyRange(Range*r);
 public:
  virtual ~ValueCopier() {};
  Value * copy(Value * value);
};

#endif

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