Re: Question about token stack

Hi Akim

On Sun, Aug 30, 2020 at 05:36:49PM +0200, Akim Demaille wrote:
> > Le 30 août 2020 à 17:17, Ervin Hegedüs <[email protected]> a écrit :
> > 
> > in my parser code I got:
> > 
> > #ifdef YYDEBUG
> >  yydebug = 1;
> > #endif
> > 
> > and I compiled the code:
> > bison -d myparser.y
> > flex -d mylexer.l
> > gcc ...
> > 
> > the output is:
> > 
> > --accepting rule at line 52 ("ConfKey2")
> > --accepting rule at line 67 (" ")
> > --accepting rule at line 55 ("fo")
> > This is a configuration directive and argument: 'ConfKey2' 'fo'
> > --accepting rule at line 68 ("'")
> > UNKNOWN TOKEN: ''' in file: badconf3.conf, line 1, state: ST_CONFIG_DIRECTIVE
> > --accepting rule at line 55 ("o")
> > Parse error: syntax error in file , line 1
> 
> These are not Bison's traces, only Flex's ones.  You need to enable Bison traces (see the documentation).

the documentation shows:

https://www.gnu.org/software/bison/manual/html_node/Enabling-Traces.html

the option -t (POSIX Yacc compliant)

the option --debug (Bison extension)

I tried with both, but I didn't get any other info - so perhaps I
forgot something. :(


a.