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Re: BISON To Represent BASIC Grammer
From: |
Valter G. Nogueira Jr. |
Subject: |
Re: BISON To Represent BASIC Grammer |
Date: |
Fri, 23 Apr 2004 10:11:13 -0300 |
Chris
I didn't answer you because I was away.
I am trying - not sucessfully - to develop a Basic grammar for a while.
Could you tell me where you found the "great post in a newsgroup where
someone has put their yacc/flex implementation of a subset of BASIC in their
post".
Thanks,
Valter
----- Original Message -----
From: "Chris Cranford" <address@hidden>
To: "Hans Aberg" <address@hidden>
Sent: Tuesday, April 13, 2004 10:12 PM
Subject: Re: BISON To Represent BASIC Grammer
> Hans -
>
> I looked around a little more detailed since I knew what to be looking for
> and found a great post in a newsgroup where someone has put their
yacc/flex
> implementation of a subset of BASIC in their post.
>
> I followed this as an example and thus far it seems to be working. So
with
> that said, let me make sure I have an understanding of what I should do.
>
> 1. Develop a way to pass the BASIC file's source to the yyparse()
> function and detect if the parse is successful or not.
>
> 2. Once the syntax pass #1 is successful, then I need to develop a
> way to 'interpret' the code and generate a bytecode instruction
> list of the code and this bytecode should then be stored in a
> file.
>
> The the bytecode file will get used by the Virtual Machine in order to
> emulate/run the code ...
>
> Right?
>
> Thanks
> Chris
>
> ----- Original Message -----
> From: "Hans Aberg" <address@hidden>
> To: "Chris Cranford" <address@hidden>
> Cc: <address@hidden>
> Sent: Tuesday, April 13, 2004 7:07 PM
> Subject: Re: BISON To Represent BASIC Grammer
>
>
> > At 18:34 -0400 2004/04/13, Chris Cranford wrote:
> > >I am trying to write a BASIC-language script bytecode compiler.
Someone
> > >recommended that I use BISON in order to properly parse my .BAS and to
> > >generate my bytecode file. Has anyone attempted this in the past or
can
> > >offer some assistance?
> >
> > If you do not get any suggestions in this list, I suggest you try the
> > newsgroup comp.compilers and its FAQ published there monthly. Also,
Bison
> > just applies the LALR(1) parsing algorithm, so you might check if there
is
> > already a open source BASIC compiler around with a .y grammar file. If
all
> > that fails, the best way is to get hold of a BASIC grammar from some
> > standard, and then attempt to adapt it for use with an LALR(1) parser
> > generator. And you probably need Flex as well to generate the lexer, see
> > GNU links, and:
> > Help-flex mailing list
> > address@hidden
> > http://mail.gnu.org/mailman/listinfo/help-flex
> >
> > Hans Aberg
> >
> >
> >
> >
> > _______________________________________________
> > address@hidden http://mail.gnu.org/mailman/listinfo/help-bison
> >
>
>
>
>
> _______________________________________________
> address@hidden http://mail.gnu.org/mailman/listinfo/help-bison
- RE: BISON To Represent BASIC Grammer, Senthil Manickavasagam, 2004/04/14
- RE: BISON To Represent BASIC Grammer, chris . cranford, 2004/04/14
- RE: BISON To Represent BASIC Grammer, Urdaneta, Alfonso E (N-Summitt Technologies), 2004/04/14
- RE: BISON To Represent BASIC Grammer, Urdaneta, Alfonso E (N-Summitt Technologies), 2004/04/15
- RE: BISON To Represent BASIC Grammer, chris . cranford, 2004/04/15