I've been using roles lately and was going to write about them on perltricks.com. However I've come into difficulty in explaining how roles are functionally different from inheritance.

I've found that the typical features described about roles in contrast to inheritance are:

• Avoid complex inheritance hierarchies


• Better encapsulation and code re-use by focusing on "does" over "is"


• Enforce polymorphism through "requires"

The difficulty I'm finding is that all of these features can be provided though inheritan…