[antlr-interest] Re: Anyone tried this ANTLR-inspired CC?

[leung13512c]

The thing that caused me to switch away from ANTLR syntax
is because I prefer the tree building syntax of JJTree that always
create imaginary nodes instead of a mix of both.  And it mostly
avoid having to create nodes within actions.

Most other things are just a matter of personal taste.

Chris.

--- In antlr-interest at yahoogroups.com, "lgcraymer" <lgc at m...> wrote:
> Chris--
> 
> Welcome!  The performance differential is not a surprise--that's 
> sort of an artifact of ANTLR 2's history.  Ter was too busy with 
> jGuru to do much polishing.  That should change with ANTLR 3, which 
> will be a major upgrade, both in terms of features and 
> implementation.
> 
> I've looked over the LLK source, and can see that you have 
> incorporated design features from several other language translation 
> tools.  I'm curious:  why did you choose the LLK syntax?  It is not 
> what I would have chosen.
> 
> --Loring
> 
> 
> --- In antlr-interest at yahoogroups.com, "leung13512c" 
> <leung13512c at y...> wrote:
> > Hi, this is Chris Leung, author of LLK. I am just one of
> > many to write open source software to kill time (somebody may
> > mistaken that as xxx ms).
> > 
> > Thanks for all the interest in LLK.  LLK is started as I explore
> > several design alternatives while I study ANTLR. It turns out
> > to have some worthwhile features and improvements.  So I released
> > the code and hope that would be useful for others.  I would be
> > most glad if anything in LLK would be useful for ANTLR.
> > 
> > To be honest, I am no expert in this field. LLK is started as a 
> hack
> > of ANTLR. The basic algorithm is same as ANTLR.  But as more and 
> more
> > feature and implementation differences comes in, it is almost
> > a complete rewrite. Most of the differences from ANTLR are 
> explained
> > in the LLK documentation at llk.sourceforge.net.
> > 
> > I ran some preliminary test (with GnuCParser) and found that it 
> (LLK
> > v0.1) is about 4-5 times faster than ANTLR 2.7.2 (in Java). But I 
> > have not dig too deep into it yet. I would certainly be glad to 
> > discuss any specific issues about LLK.
> > 
> > Thanks,
> > Chris.
> > 
> > --- In antlr-interest at yahoogroups.com, Terence Parr <parrt at c...> 
> wrote:
> > > 
> > > On Tuesday, November 4, 2003, at 01:26 PM, Oliver Zeigermann 
> wrote:
> > > 
> > > > Had a quick look at it and found it interesting too. It takes 
> up the
> > > > idea that certain semantic actions should be executed while 
> guessing.
> > > >
> > > > The code does not seem to be copied at all, but at most 
> inspired by
> > > > ANTLR. Terence, has this guy never contacted you?
> > > 
> > > Nope....it took me a while, but I found what I think is an email 
> > > address; no name.  I emailed him last night and quickly looked 
> at the 
> > > source code.  I too verified that he had not just copied the 
> source 
> > > except for some smaller files.
> > > 
> > > >  Maybe it could be
> > > > interesting to share ideas or experience. I invited him to 
> present his
> > > > ideas here on the mailing list. Let's see if he does...
> > > 
> > > Great! :)  Let's see if he likes the LL-regular.  I wonder who 
> he is.  
> > > The code showed a nontrivial understanding of the area.
> > > 
> > > Ter
> > > --
> > > Professor Comp. Sci., University of San Francisco
> > > Creator, ANTLR Parser Generator, http://www.antlr.org
> > > Co-founder, http://www.jguru.com
> > > Co-founder, http://www.knowspam.net enjoy email again!
> > > Co-founder, http://www.peerscope.com pure link sharing


 

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