%option 8bit nodefault yylineno noyywrap

%{
// This is c/c++ code, whatever you need goes here.
#include <iostream>
#include "token.h"
#include "symbolTable.h"


using namespace std;

SymbolTableT symbolTable;
TokenT yylval;

%}


/* regular definitions */
/* this code is (mostly) from the book*/

delim		[ \t\n]
ws		{delim}+
letter		[A-Za-z]
digit		[0-9]
id		{letter}({letter}|{digit})*
number		{digit}+(\.{digit}+)?(E[+-]?{digit}+)?

%%

{ws}		 /* no action and no return */

if		{
                 yylval.first = IF; 
                 return(IF);
		}

then		{
                 yylval.first= THEN;
                 return(THEN);
		}

else		{
                 yylval.first= ELSE;
		 return(ELSE);
		}

{id}		{
                   if (not symbolTable.IsPresent(yytext)) {
		      symbolTable.Insert(yytext, ID);
		   }
		   yylval.first = ID;
                   yylval.second.symbolInfo = symbolTable.Entry(yytext);
		   return (ID);
		}

{number}        {
                   if (not symbolTable.IsPresent(yytext)) {
                     symbolTable.Insert(yytext,NUMBER);
	 	   }
		   yylval.first = NUMBER;
                   yylval.second.symbolInfo = symbolTable.Entry(yytext);
		   return (NUMBER);
		}

"<"		{ 
		  yylval.second.opid = LT; 
		  yylval.first=RELOP;
		  return RELOP;
		}

"<="		{ 
		  yylval.second.opid = LE; 
		  yylval.first=RELOP;
		  return RELOP;
		}

"<>"		{ 
		  yylval.second.opid = NE; 
		  yylval.first=RELOP;
		  return RELOP;
		}

"="		{ 
		  yylval.second.opid = EQ; 
		  yylval.first=RELOP;
		  return RELOP;
		}

">"		{ 
		  yylval.second.opid = GT; 
		  yylval.first=RELOP;
		  return RELOP;
		}

">="		{ 
		  yylval.second.opid = GE; 
		  yylval.first=RELOP;
		  return RELOP;
		}

%%

int main () {
     TokenIDT t;
     while(t = TokenIDT(yylex()) ) {
        cout << yylval << endl;
     }

     return 0;
}