Re: accessing yyval outside lex and yacc

[Akim Demaille]

| main()
| {
| 
| int return_value = ::yyparse();  /* which works fine */
| 
| Constraint* root = yyval.constraint;  /* hoping to gain access to string1 -
| but i */
|                                                         /* actually get a
| null pointer instead*/
| 
| }

Constraint *root;

int
main ()
{
  int return_value = ::yyparse();
  // Use root
  exit (0);
}

and in the axiom of your grammar, write what I wrote (i.e., root = $$,
with some extern Constraint *root in the preamble).