lexer.h

#ifndef __LEXER__H__
#define __LEXER__H__

#include <vector>
#include <string>

#include "inputbuf.h"

// ------- token types -------------------

typedef enum { END_OF_FILE, INT, REAL, BOO, TR, FA, IF, WHILE, SWITCH, CASE, PUBLIC, PRIVATE, NUM, REALNUM, NOT, PLUS, MINUS, MULT, DIV, GTEQ, GREATER, LTEQ, NOTEQUAL, LESS, LPAREN, RPAREN, EQUAL, COLON, COMMA, SEMICOLON, LBRACE, RBRACE, ID, ERROR // TODO: Add labels for new token types here
} TokenType;

class Token {
  public:
    void Print();

    std::string lexeme;
    TokenType token_type;
    int line_no;
};

class LexicalAnalyzer {
  public:
    Token GetToken();
    TokenType UngetToken(Token);
    LexicalAnalyzer();

  private:
    std::vector<Token> tokens;
    int line_no;
    Token tmp;
    InputBuffer input;

    bool SkipSpace();
    bool SkipComments();
    bool IsKeyword(std::string);
    TokenType FindKeywordIndex(std::string);
    Token ScanIdOrKeyword();
    Token ScanNumber();
};
void update_Types(int LHS, int RHS);
void addList(std::string n, int lN, int t);
//void printList(void);
int Search_List(std::string n);



#endif  //__LEXER__H__