----- Original Message ----- From: "Patrick R. Michaud" <[EMAIL PROTECTED]> Date: Wednesday, September 8, 2004 1:21 pm Subject: Re: Current state?
> On Wed, Sep 08, 2004 at 09:56:12AM -0700, Larry Wall wrote: > > On Wed, Sep 08, 2004 at 07:33:45AM -0600, Patrick R. Michaud wrote: > > : We're in the beginning stages of building a basic perl 6 > grammar engine > > : (i.e., probably without p6 closures) that compiles to parrot > and handles > > : basic optimizations. > > > > I wonder whether, in the absence of closures, we'll have to have > some> similar way to embed syntax-tree building code (PIR?) as > actions in > > the grammar. > > We may indeed need this. I think the easiest way would be to > build some sort of "special-purpose" assertions or rules that > fire off some PIR code. That's probably the best solution for now. > Or, perhaps we can just find a way to do a funky sort of replacement > whereby p6 source code gets replaced by its equivalent PIR code as > soon as the compiler think it has a rule matched. Naaah, scratch > that. We tried that as an optimization in the prototype Perl6 compiler. It ended up being a really really really bad idea because the grammar backtracked like a madman. It might be workable if we can infuse <commit>'s in every location possible... - Joe
