A yacc/bison that outputs elisp?

A yacc/bison that outputs elisp?

[Sun Yijiang]

Is that possible? Anyone had the same thoughts? I think it would be
very very useful for an editor to have such syntax-specific parsing
ability.

For lex/flex, Emacs has the ability to filter out comments and strings
as they do.

Sun Yijiang

Re: A yacc/bison that outputs elisp?

[Stefan Monnier]

> Is that possible? Anyone had the same thoughts? I think it would be
> very very useful for an editor to have such syntax-specific parsing
> ability.

There's a package out there that does just that (IIRC it uses bison and
post-processes the C output to turn it in to elisp).
Can't remember the name, tho,


        Stefan

Re: A yacc/bison that outputs elisp?

[Kai Großjohann]

There is the Semantic Bovinator.  If I understand correctly, it's a
parser generator written in Emacs Lisp, generating Emacs Lisp code.

The SourceForge project is called CEDET, and it includes context aware
completion as an application of the parser generator.

Kai

Re: A yacc/bison that outputs elisp?

[Stefan Monnier]

>> Is that possible? Anyone had the same thoughts? I think it would be
>> very very useful for an editor to have such syntax-specific parsing
>> ability.

> There's a package out there that does just that (IIRC it uses bison and
> post-processes the C output to turn it in to elisp).
> Can't remember the name, tho,

It's called "scanner.el" and written by John Wiegley (famous for several
other Emacs packages).

Look for it on gnu.emacs.sources,


        Stefan

Re: A yacc/bison that outputs elisp?

[Sun Yijiang]

I found his homepage at http://www.newartisans.com/johnw, but there's
no scanner.el found. Also I searched mail archive of
gnu.emacs.sources, but still not found. Where can I download it,
please?


On Mon, 28 Mar 2005 12:31:32 -0500, Stefan Monnier
<monnier@iro.umontreal.ca> wrote:
> >> Is that possible? Anyone had the same thoughts? I think it would be
> >> very very useful for an editor to have such syntax-specific parsing
> >> ability.
> 
> > There's a package out there that does just that (IIRC it uses bison and
> > post-processes the C output to turn it in to elisp).
> > Can't remember the name, tho,
> 
> It's called "scanner.el" and written by John Wiegley (famous for several
> other Emacs packages).
> 
> Look for it on gnu.emacs.sources,
> 
> 
>        Stefan
>

Re: A yacc/bison that outputs elisp?

[Stefan Monnier]

> I found his homepage at http://www.newartisans.com/johnw, but there's
> no scanner.el found. Also I searched mail archive of
> gnu.emacs.sources, but still not found. Where can I download it,
> please?

groups.google.com => group:gnu.emacs.sources scanner.el


        Stefan

Re: A yacc/bison that outputs elisp?

[John Wiegley]

Sun Yijiang <sunyijiang@gmail.com> writes:

> I found his homepage at http://www.newartisans.com/johnw, but
> there's no scanner.el found. Also I searched mail archive of
> gnu.emacs.sources, but still not found. Where can I download it,
> please?

scanner.el only produces lexers, not parsers.  And it is somewhat
ancient.  It should still work, but no guarantees...

John

Re: A yacc/bison that outputs elisp?

[Stefan Monnier]

> scanner.el only produces lexers, not parsers.  And it is somewhat
> ancient.  It should still work, but no guarantees...

BTW, have you actually used it?  For what?
How was the performance?


        Stefan

Re: A yacc/bison that outputs elisp?

[John Wiegley]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

> BTW, have you actually used it?  For what?  How was the performance?

I did use it once, but didn't measure the performance.  It relies
heavily on a tight loop that does lots of vector lookups.

John