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Postings from April 2005
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
> instead.
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 Sandlaß)
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