OK, so it doesn't exist yet, but on of the stated goals of the PPI module (the perl document parser) is to be able to provide source code analysis tools.

If anyone is interested in the subject, and helping to write Perl::Doc, I would love to hear from them. PPI is finally starting to stabilise, so now would probably be a good time to kick off Perl::Doc. There may also be some alignment with CPANXR the CPAN cross reference.