Re: help needed with yacc/bison

Sorry,

forgot to attach archive :)
Oleg
On Tue, 1 Jul 2003, Oleg Bartunov wrote:

> Hi there,
>
> attached archive contains simple parser demonstrating our
> problem. untar it, make, make test
>
> Good test:
> echo -n 12 34.1234 ... | ./parser
> INTEGER:        '12'
> CHAR:   ' '
> VERSION:        '34.1234'
> CHAR:   ' '
> DOT:    '.'
> DOT:    '.'
> DOT:    '.'
> Wrong:
> echo -n 12 34.1234. ... | ./parser
> INTEGER:        '12'
> CHAR:   ' '
> yyerror: syntax error, unexpected CHAR, expecting INTEGER
>
> The problem is recognizing VERSION
> (from gram.y)
>
> version:
>         INTEGER DOT INTEGER    { $$ = strconcat($1, $3, $2); }
>         | version DOT INTEGER  { $$ = strconcat($1, $3, $2); }
> ;
>
> For last query '34.1234.' we want to print VERSION '34.1234' and
> return DOT.
> This is just an test example, actually we know workaround
> for this case, but we need something simple and universal :)
>
>
>     Regards,
>         Oleg
> _____________________________________________________________
> Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
> Sternberg Astronomical Institute, Moscow University (Russia)
> Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
> phone: +007(095)939-16-83, +007(095)939-23-83
>
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Don't 'kill -9' the postmaster
>
Regards,    Oleg
_____________________________________________________________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83