[ann] regexp-engine 0.10

ruby-talk
1

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