Larry Wall wrote:
Roles cannot be derived from, so they're always final in that sense.
We should probably consider them closed by default as well, or at least
closed after first use.  If a role specifies implementation, it's always
default implementation, so overriding implementation always occurs in a class

Ohh, is the following illegal?

role Blahh does Blubber {...}

Or is that just not considered derivation but, hmm, specialisation, subtyping
subroleing or some such?
So, does the above produce the subtyping relation Blahh <: Blubber?
TSa (Thomas SandlaÃ)

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