[rucksack-devel] Et tu, prevalence?

[Arthur Lemmens]

Nikodemus wrote:

> The reason why I think it is important to have them as separate metaclasses
> (with their own root-classes) is that they will have somewhat different
> semantics.
>
> * holding on to a reference to a prevalent-object outside a
>   transaction is not a problem.
>
> * reading a slot of a prevalent-object outside a transaction
>   could be permitted.
>
> * two prevalent-objects with same object-id's are always EQ.
>
> Making the distinction at class-level makes things easier for
> user-level code, and probably keeps the implementation cleaner too.

OK, fine.  So you'll define a different prevalent metaclass, but you
don't assume that one rucksack can contain both prevalent and persistent
object, right?  Sounds reasonable to me.

Arthur