%option noyywrap
%option nounput
%{
#include <iostream>
#include <cstdlib>
#include <string>
#include "syn_tree.hpp"
  using namespace std;

#include "parser.tab.hpp"

%}


%%
"begin"         return begin_token;
"end"           return end_token;
"print"         return print_token;
"while"         return while_token;
"do"            return do_token;
"if"            return if_token;
"then"          return then_token;
"else"          return else_token;
[a-zA-Z_]+      { yylval.s = new string(yytext); return id_token; }
[0-9]+          { yylval.i = atoi(yytext); return num_token; }
[-+*/:=;.()<>]  return *yytext;
[ \t\n]         {  }
.  {
  cerr << "Leksicka greska: neprepoznat karakter " << *yytext << endl;
  exit(EXIT_FAILURE);
}
%%