From: Charles Comstock <cc1@...>
Date: 2004-04-22T10:44:09+09:00
Subject: Re: [ann] regexp-engine-0.8, perl5 + some perl6

Simon Strandgaard wrote:

> download:
> http://rubyforge.org/frs/?group_id=18&release_id=422
> 
> play with regexp online:
> http://neoneye.dk/regexp.rbx
> 
> RAA entry:
> http://raa.ruby-lang.org/list.rhtml?name=regexp
> 
> 
> About
> =====
> 
> Here is an Regexp engine written entirely in Ruby.
> It allows you to search in text with advanced search patterns.
> It supports Perl5 syntax... plus some perl6 syntax (more to
> come in the future). Its fairly compatible with Ruby's native
> regexp engine (GNU), and when running against the Rubicon
> testsuite, it passes 96.025% out of 1560 total tests.
> 
> The implementation is simple, yet without any optimizations.
> Therefore speed is slow.. At some point when optimizations
> are in place, I plan to do a re-implementation in C++.
> Because of the simplicity, the code should be easy to grasp
> and extend with your own custom code.
> 
> 
> Goals
> =====
> 
> Be compatible with Ruby's GNU regexp engine (perl5 syntax).
> DONE, This is goal fullfilled.
> 
> Support Perl6 regexp-syntax (even before perl6 gets finished).
> This new syntax is less obfuscated than old perl5 syntax.
> Perhaps also make a converter between perl5 <-> perl6 syntax.
> Not fullfilled yet, but I am working on it.
> 
> The AEditor project needs a flexible regexp-engine for doing
> lexing, so that text can get syntax-colored.
> Future.
> 
> The Ruby-in-Ruby project needs a regexp-engine.. this engine
> will hopefully become suitable.
> Optional.
> 
> Explain-regexp.. output a verbose overview of what each
> opcode in the regexp does.
> Optional.
> 
> 
> Status
> ======
> 
> The project has completed the 'make it work' phase, and has
> entered the 'make it right' phase, where I will focus on
> optimization, so that decent speed can be achieved.
> 
> Running the engine against the Rubicon testsuite, yields
> pass=1498, fail=62,  pass/total=96.025%
> The failing tests are mostly obscurities in GNU.
> 
> Besides that there are 402 tests, which both does whitebox
> and blackbox testing. However in order to run the tests
> its necessary to fetch Michael Granger's Test::Unit::Mock
> package. 
> 
> 
> License
> =======
> 
> Ruby's license.
> 
> 
> Acknowledgements
> ================
> 
> Mark Sparshatt 
> * Got the inital idea of extending with perl6.
> * NewMatchData class, NewRegexp class. 
> 
> Guy Decoux/Dave Thomas
> * stolen part of rubicon testsuite which exercises regex.
> 
> 
> Contact
> =======
> 
> In case you find a bug og have suggestion for improvements,
> then feel free to mail me. 
> 
> Simon Strandgaard  <neoneye@adslhome.dk>
> 
> 
> Thanks for your patience.
> 
> 

Does it include the perl6 embedded grammars in regex stuff?
	Charlie