languages/regex/docs/regex.pod
Irregular expressions and how to implement 'em (WORK IN PROGRESS).

languages/regex/lib/Parrot/Test/Regex.pm
Testing routines specific to 'regex'.

languages/regex/lib/Regex/Optimize.pm
Optimize a sequence of list ops.

languages/regex/pmc/match.pmc
Match object for rules.

languages/regex/pmc/matchrange.pmc
MatchRange Numbers PMC Class.