Re: Debugging "$4"

Akim Demaille <[email protected]> Thu, 8 Oct 2020 08:17:44 +0200

Newsgroups	gmane.comp.parsers.bison.general
Message-ID	<[email protected]>


> Le 7 oct. 2020 à 23:52, Chris verBurg <[email protected]> a écrit :
> 
> 
> I don’t know if this is helpful, but is there a problem with ambiguity between these parses:
> 
> (IF 1=1 THEN PRINT “3” ) : PRINT “4”
> 
> and
> 
> IF 1=1 THEN (PRINT “3” : PRINT “4”)
> 
> ?  Because if the shift/reduce conflict resolved toward the first one, then $4 really only has one statement anyway.

Chris might be very right here.  Maury, have you looked at your debug traces?  

https://www.gnu.org/software/bison/manual/html_node/Tracing.html