%{
using namespace std;
#include <iostream>
#include <cstdlib>
#include "lunch.tab.h"
int line_num = 1;
%}

%%

with                      { return WITH_tok; }
pizza                     { return PIZZA_tok; }
sandwich                  { return SANDWICH_tok; }
"ice cream"               { return ICE_CREAM_tok; }
and                       { return AND_tok; }
pepperoni                 { return PEPPERONI_tok; }
cheese                    { return CHEESE_tok; }
"chocolate sauce"         { return CHOCOLATE_SAUCE_tok; }
pineapple                 { return PINEAPPLE_tok; }
\.                        { return PERIOD_tok; }
\n                        { line_num++; }
[ \t\r]                   { ; }
.                         {
                             cerr << "lexical error on line " << line_num;
                             cerr << ": " << yytext << endl; 
                             exit(1);
                          }