/* File........ tokens.lex 
 * Contents.... rules to get tokens from standart input
 * 
 * Compilation:
 *   flex tokens.lex
 *   gcc -o parser5.exe parser5.c lexyy.c
 */


/* ---------------- Definitions space ----------------- */
%option noyywrap
%{
#include "tokens.h"
%}


/* ------------------- Rules space -------------------- */
%%

[a-zA-Z][0-9a-zA-Z]*     return VARIABLE; 
[0-9]+                   return DIGIT;
[\+\-\/\*]               return OPERATOR;
\=                       return EQUALS;
\:\=                     return ASSIGN;
\;                       return SEPARATOR;

[\ ]+
\n                       
.                        return ERROR;
%%