From: Simon Strandgaard <neoneye@...>
Date: 2004-05-07T02:18:40+09:00
Subject: [ann] regexp-engine 0.10

download:
http://rubyforge.org/frs/?group_id=18&release_id=465

play with regexp online:
http://neoneye.dk/regexp.rbx

RAA entry:
http://raa.ruby-lang.org/list.rhtml?name=regexp

I am proud to present an Regexp-engine written entirely in Ruby, 
fairly compatible with Ruby's native engine (GNU). 

There are 2 major changes since last version:
*   Added lookbehind positive/negative of variable-width. 
    /g(?<=(a.*)g)o./ ~= 'goa algol goto'   #-> ['gol', 'a al'] 
    For instance the Oniguruma engine chokes on such expressions 
    because it only supports fixed-width lookbehind.

*   I now preserve subcaptures (Earlier I accidentially cleared subcaptures).
    /a(|ab)*b/ ~= 'aaabbb'    #-> ['aabb', 'ab']
    For instance the Oniguruma engine very often clears subcaptures, 
    and in this case it outputs ['aabb', ''].. which is less desired.

--
Simon Strandgaard