Re: [Cardinal-dev] (Fwd from perl6-internals) I'm baaa-ack :)

[Dan Sugalski]

At 8:47 AM -0700 8/12/02, Phil Tomson wrote:
> On Mon, 12 Aug 2002, Dan Sugalski wrote:
>
>  > At 11:03 PM -0700 8/11/02, Phil Tomson wrote:
>  > >On Mon, 12 Aug 2002, Jeff wrote:
>  > >>  Within the Yacc/ directory, however, will be the original parse.y file
>  > >>  from ruby's source. This one actually passes the left-recursive test
> >  >>  completely, but is probably going to offer many more problems than the
> >  >>  pseudogrammar offered in the top level.
> >  >>
> >  >>  Until we have permission to use the official parse.y-derived grammar,
> >  >>  let's hold off on using it. Feel free to play with it, and if you can
> >  >>  make it completely work, feel free, but don't commit quite yet.
> >  >
> >  >Why do you need permission?  You can use the yacc files that come with
> >  >Ruby without needing to get any permission.
> >
> >  We weren't sure and, while it's not a problem as we've found, we'd
> >  much rather be cautious with what we do with other people's work.
> >  Better to do that and find there was no reason than to really annoy
> >  someone.
> Right-o.
>
> So, can you give me more details about what you're doing?

What we've done is taken the Ruby grammar and created a set of 
recursive-descent rules for perl's Parse::RecDescent module, which 
means we can now parse ruby. Since the rules are all

> I think I missed something...
>
> Seems like on the Perl6 dev side that you guys are working on a Ruby
> frontend using Ruby's current lex/yacc and using it to generate Parrot
> code.  How can we in Cardinal help?

We've got the grammar parser, what we need is something to take that 
grammar and turn it into either parrot bytecode or something that 
IMCC can eat to produce bytecode. (Checking that the grammar is right 
would probably be good too :)

We need a quick survey of Parrot to see what facilities it *doesn't* 
have that Ruby needs, so we can get those done.

There's probably more, and I could always use a cookie, but I think 
that'll do for now.

> BTW: I won't be working after next week, so I'll have time again to put
> into Parrot.

Well, that sucks. And is good, depending on your perspective. :)
--
                                        Dan

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Dan Sugalski                          even samurai
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                                      teddy bears get drunk