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typeless.h

Go to the documentation of this file.

#ifndef ___TYPELESS_H___
#define ___TYPELESS_H___

#include <string>
using std::string;
#include <iostream>

#include "../src/stringutils.h"
#include "../src/ind_types.h"



class Typeless {
public:
  typedef  Typeless self;
  virtual ~Typeless() { }
  
  virtual string stringrep(String::StreamFormat format=String::StreamFormat()) const=0;
  
  virtual string prettyprint(String::StreamFormat format=String::StreamFormat()) const
    {  return stringrep(format);  }
  
  virtual string typestring() const {  return "Unspecified";  }

  virtual bool operator<  (const Typeless& o) const=0;
  virtual bool operator>  (const Typeless& o) const=0;
  virtual bool operator== (const Typeless& o) const
    {  return !(*this < o || *this > o);  }
  virtual bool operator!= (const Typeless& o) const
    {  return !(*this == o);  }

  virtual Typeless& set(const Typeless& o) =0;
  
  typedef
#ifndef LONG_DOUBLE_UNAVAILABLE
  long
#endif
  double exprtype;

  virtual bool isnumeric() const {  return false;  }

  virtual exprtype numericvalue() const {  return 0;  }

  virtual Typeless* parse(const StringParser& parser, const string& s) const =0;
  
  virtual Typeless* clone() const=0;

  virtual Typeless* duplicate() const=0;
};



#endif /* ___TYPELESS_H___ */

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