Are anonymous enums mostly available for performance reasons?

[dsimcha]

== Quote from BobR (brhodes at simple.access.com)'s article
> When are anonymous enums preferred over named enums? Maybe they are in
> the language for historical reasons? Or are they truly useful enough to
> warrant having a 2 kinds of enums?

IMHO anonymous enums are useful just to save typing.  When the name of the enum is
unique and self-explanatory enough, I don't want the verbosity of putting it in
its own namespace.