Re: Ripple effect

[Robert A Duff <bobduff@shell01.TheWorld.com>]

"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:

> You don't need it, if the language offers constructs to handle namespaces,
> especially to compose them out of existing ones. Then you could merge
> specifications of several packages into a new specification and re-use it
> where needed. 

It would certainly be useful to be able to say "package X exports
everything declared in packages A, B, C, and D", in a maintainable way
(so that if you add something to A it automatically appears in X).
Ada allows renaming, but that's unmaintainable, because you have to
rename each thing separately.  Ada also allows derived types, which
automatically suck in the primitive ops, but that doesn't work for
generics, exceptions, etc, and it breaks when you have two related
types.

- Bob