On Wed, Aug 19, 2009 at 11:45 AM, Reinier Zwitserloot <[email protected]>wrote:

>
> disjoint types are structural in that you weaken the namespacing of
> members.
>
>
Disjoint types aren't structural unless the language makes them so.  Java
could be extended with disjoint types that compute a least upper bound
nominally rather than structurally.  Or it could require type dispatch and
never use a LUB.  As for namespacing, well it can't be made any weaker than
it already is.  It's a weak concept and always has been.

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