_LEX AND YACC_
by Ian Gorman

Listing One

  1 %{
  2 #include "ytab.h"
  3 extern int yylval;
  4 %}
  5 
  6 %%
  7 
  8 [A-Z]   {
  9         yylval = *yytext - 'A';
 10         return VARIABLE;
 11     }
 12 
 13 [a-z]   {
 14         yylval = *yytext - 'a';
 15         return VARIABLE;
 16     }
 17 
 18 [0-9]+  {
 19         yylval = strtol(yytext, (char **)NULL, 0);
 20         return INTEGER;
 21     }
 22 
 23 0x[0-9...