Hi Eric,

I think the idea has been to first reimplement the current grammar so
as to allow easier extension afterwards (i.e. Victor's mentioning of
adding opcode arrays). There's also been talk here that once the
individual parts of the parser have been refactored into the smaller
chunks which correspond to the grammar rules instead of the mostly
monolitihic function it is now, it'll open up some possibilities to
adapt other grammars on top of the Csound engine (i.e. MPEG4-SAOL).

There is the beginnings of a lexx/yacc parser in the Csound5 cvs in
the Jsound directory.  I've been reading up on parsers a lot over the
years and have built a number of handmade ones in blue but have never
had the time to work on one using lex/yacc.  I'd love to help in this
as well, though probably won't be able to offer much more than
testing.

I still think that the current parser and new parser should be
developed in parallel with a commandline option to switch between
using one or the other.

steven


On 3/23/06, Erik de Castro Lopo <mle+la@mega-nerd.com> wrote:
> Victor Lazzarini wrote:
>
> > >* Finishing the new orchestra parser.  (A new score parser would not be a
> > >bad idea either).
> >
> > The thing is, one of us will have to volunteer to partner John in that
> > venture, as he is the only one in it. We will have to spend sometime learning
> > musmon code and then yacc/lex. But that's of great importance.
>
> What is the new orc parser intended to achieve? Is a new orc
> grammar going to be developed or is it simply a reimplemntation
> of the current grammar in lex and yacc?
>
> If its the former, I would be willing to lend a hand. I have
> had considerable experience over the last many years using
> flex and bison (GNU versions of lex and yacc) as well as
> the O'caml versions (ocamllex/ocamlyacc). I am also rather
> interested in programming languages and their grammars.
>
> Erik
> --
> +-----------------------------------------------------------+
>   Erik de Castro Lopo
> +-----------------------------------------------------------+
> "These are the finest moments in (post)modern life, when satire is completly
> indistinguishable from reality... I usually have to rely on the presidential
> elections for such dada." -- frenomulax on Jesux a christian Linux distro.
>
>
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