JBLToken.h

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#ifndef __JBLTOKEN_H
#define __JBLTOKEN_H

#include <string>
#include <iosfwd>



//  Class JBLToken:

class JBLToken {
  private:
    enum Type {EMPTY, UNKNOWN, IDENTIFIER, INT, FLOAT, BOOL, OPERATOR, PARANTHESIS};
  
  public:
    JBLToken();
    
    bool input(std::istream& is);
    
    bool isEmpty()  const      {return type == EMPTY;}
    bool isUnknown() const     {return type == UNKNOWN;}
    bool isIdentifier() const  {return type == IDENTIFIER;}
    bool isNumber() const      {return (type == INT) || (type == FLOAT) ;}
    bool isInt()  const        {return type == INT;}
    bool isFloat()  const      {return type == FLOAT;}
    bool isBool()  const       {return type == BOOL;}
    bool isOperator() const    {return type == OPERATOR;}
    bool isParanthesis() const {return type == PARANTHESIS;}
    
    int                getIntValue() const    {return intvalue; }
    float              getFloatValue() const  {return floatvalue; }
    bool               getBoolValue() const   {return boolvalue; }
    const std::string& getStringValue() const {return stringvalue;}
    
    std::ostream& print(std::ostream& os) const;
    
  private:
    std::string stringvalue;
    int         intvalue;
    float       floatvalue;
    bool        boolvalue;
    Type        type;
    
    static bool isoperator (char c);
    static bool issimpleoperator (char c);
    static bool isparanthesis (char c);
};


std::istream& operator>> (std::istream& is, JBLToken& token);


std::ostream& operator<< (std::ostream& os, const JBLToken& token);

#endif /* #ifndef __JBLTOKEN_H */

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