some time ago I found an article (Roles: Composable Units of Object Behavior) describing the pros of using Roles versus Interfaces or other ways of dealing with behavior requirements. Does any of you knows where I can find more literature about that, or knows more about Roles?
I know that that’s almost a research topic, but maybe someone (maybe some Perl programmer) has tried something with it (Moose?).
Note: the reason for adding tag ‘perl’ is that maybe Perl programmers are more likely to give an answer.
For Moose based examples, you should check this and that example and this specification.
ETA: For the theoretical aspects, see this page