From: hipster <hipster@...4all.nl>
Date: 2001-10-30T20:12:27+09:00
Subject: [ruby-talk:23832] Re: GUI for Ruby

On Tue, 30 Oct 2001  17:19:22 +0900, Robert Feldt wrote:
> On Tue, 30 Oct 2001, Benoit Cerrina wrote:
> 
> > > like it... Or for that matter use an existing java yacc grammar (if there
> > > are any).
> > antlr is a great parser generator for java or c++ it is very modern compared
> > to yacc and easier to debug and it has available a java grammar see
> > www.antlr.org
> >
> Yes, but it handles LL(k) grammars which does not include all Context-free
> languages. So for some grammars you'll have to adapt what you want to what

JFYI: ANTLR should be able to handle any type 0-3 grammar using
semantic and syntactic predicates, multiple parsers/lexers, AST
transformations, &c. Still extra work, but no need to rewrite the
grammar.

> it can handle. Generalized LR (GLR) parser generators (and also Early
> parser generators) can handle all context free languages. Rockit is one
> GLR parser generator for Ruby in its infancy.

Michel