Re: Bison Parser to create MT-safe code like Lemon Parser

[Akim Demaille]

Le 6 juil. 09 à 12:12, vivekanandan r a écrit :

> Hi,

Hi,

>       I am
> thankful towards all the GNU Bison developer team.  I have been
> immensely   benefited by Bison and am very grateful for it.

Thanks for saying!

> I have a
> suggestion and would like to share it with you here.
>
> Parser generated by bison should be MT (MultiThread)-safe :
>
>    Lemon Parser
>  generated code is re-entrant and MT-Safe which attracts
>  Bison   users like me to move to Lemon. ex: PHP.

Can you tell me more about that?  What makes you think our parsers are  
not thread-safe?  Which parsers are you using?  Yacc-like parsers?   
Then of course, they are not, but if you use sane interface (look for  
"pure" in the documentation), I don't see why the parser would not be  
thread-safe.

> Hence we have to add custom option to generate lemon based parser  
> code which
> will be more useful for all. I have just implemented VCG Graph for  
> the Lemon
> Parser(code: http://www.gnudeveloper.com/software/lemon/lemon.c)..
> And  I am now interested in implementing this feature in Bison.

I'm not sure I understand what we you mean here.  Do you mean you  
wrote a grammar for VCG using Lemon?  Do you mean you generate a VCG  
graph from the grammar?  In the latter case we've had this feature for  
years in Bison, and actually today we target Dot instead of VCG.