http://www.perlmonks.org?node_id=879363

szabgab has asked for the wisdom of the Perl Monks concerning the following question:

Since the release of perl 5.12 people can write extension to perl pluggin in their own syntax. Perl itself comes with a sample module called XS::APItest::KeywordRPN.

Are there any other modules using this feature? Do you know about anything outside CPAN using it or experimenting with it alread?