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Token.h

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/*
  File: Token.h

  Copyright(C) C. Kotterink, Computed Graphics
*/
#ifndef TOKEN_H
#define TOKEN_H

#include<iostream.h>
#include<string>

class ObjectFile;

typedef enum TokenId {
    nosym = 0,          
    eofsym,             
    // Brackets
    lgroupsym,          
    rgroupsym,          
    lsqbracksym,        
    rsqbracksym,        
    lbracksym,          
    rbracksym,          
    // Seperators
    commasym,           
    colonsym,           
    semicolonsym,       
    // Comment
    commentsym,         
    commentOpensym,     
    commentClosesym,    
    // Operators
    multiplysym,        
    substractsym,       
    addsym,             
    dividesym,          
    // Variable
    directivesym,       
    numbersym,          
    stringsym,          
    classsym,           
    lastsym,            
};

class Token
{
    friend ObjectFile;

    friend ostream &operator<<(ostream &stream, const Token &token);

public:
    static const string lookup(TokenId type);

    Token() : id(nosym) {}

    Token &operator=(const Token &t);

    bool operator==(TokenId t) const {
        return id == t;
    }

    bool operator!=(TokenId t) const {
        return id != t;
    }

    TokenId getId() { return id; }

    int asInt() { return (int)asDouble(); }

    float asFloat() { return (float)asDouble(); }

    double asDouble() { return value; }

    string &asString() { return data; }
    
protected:
    static const string stringTable[];

    TokenId id;

    double value;

    string data;
};
#endif

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