Is there a more modern regexp handler for Open Object Rexx? [closed]

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The regular expression class (rxregexp.dll) that comes with ooRexx (I'm on 4.0.0) is relatively low on functions compared, say, with Python's re module (even at 2.5.2).

It appears to have no assertions, no facilities for group extraction, or for substitution. Greedy or lazy matching is a global pattern option, rather than flagged by an additional "?". Basically, a pre-PCRE regular expression engine.

Does anyone know if anything with more up-to-date function is available?