I think you and I are on different trips here. I don't
know what the real story is though.
I don't see why Perl needs interfaces in any form, they're
just there to satisfy the compiler in statically typed
languages, aren't they?
I think of roles as reuseable partial classes. So they add
generic behaviour, customized by the state accessors they
use (or metadata).
I'm more going from the paper than A12, though.
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