Roles are not part of the Perl language so they must be implemented via modules. The minutiae of the mechanisms for implementing roles will depend on which module you use. As ever, if you want to know the implementation details you only need to look in the source.

More recent books such as Modern Perl by chromatic do mention roles but (quite reasonably) don't delve into the underlying mechanisms.

In reply to Re^5: Creating dynamic parent/child relationships by hippo
in thread Creating dynamic parent/child relationships by nysus

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