Re: accessing yyval outside lex and yacc

[Akim Demaille]

>>>>> "Hans" == Hans Aberg <address@hidden> writes:

Hans> As Akim points out, there is currently no pure way of getting
Hans> hold of the $$ value. I think that incorporating such a way was
Hans> up last fall in the bug-bison list. -- Check the archive.

There is!  Use %pure_parser.  But that's more complex, and I see no
real point in using it.  See `Calling Conventions for Pure Parsers',
especially YYPARSE_PARAM.

A good approximation simply consists in a wrapper around yyparse, in
the preamble, or the postamble of your .y:

Constraint *
constraint_parse ()
{
  Constraint *res = 0
  // Set up yyin
  if (yyparse ())
    return root;
  else
    return NULL;
}

and keep root static.