[cedet-semantic] Is there a wisent analog to Bison %empty non-empty rule?

[Christian J. <chr...@cv...>]

Hi!

I'm translating the PHP bison grammar to wisent and currently I'm stuck 
at a rule that looks like this:

backup_fn_flags:
     %prec PREC_ARROW_FUNCTION %empty { $$ = CG(extra_fn_flags); 
CG(extra_fn_flags) = 0; }
;

The %prec symbol seems to work with Wisent but for the %empty I get the 
message "wisent-parse-nonterminals: Symbol ‘%empty’ is used, but is not 
defined as a token and has no rules"

Is it possible to solve this?

For empty %empty rules I just replace %empty with ;; empty\n but I don't 
know what to do when there are other nonterminals in the rule

-- 
Hälsningar / Best Regards
Christian