Re: XML DOM Binding for Ada 95 - matter of style

["Matthew Heaney" <matthewjheaney@earthlink.net>]

"Marin David Condic" <nobody@noplace.com> wrote in message
news:3F2BA9C8.9030700@noplace.com...
> So things like type extension don't count? :-)

The type extension exists in order to implement the dynamically bound
operation.


> I see tagged types as the way to fully implement the Object Oriented
> paradigm in Ada. Other mechanisms in Ada could be used to support parts
> of the OO paradigm - sometimes they have to be brutally flogged into
> that service - but none really creates the full OO paradigm as do tagged
> types.

Except for the private derivation needed to get controlledness, Charles
manages to be "object-oriented" without using inheritance.  There is no
brutal flogging.

In fact Charles could be ported to Ada83 without much pain.


> Not all programs require OO nor are they best expressed in the OO
> method. I work on software like that every day. But if you have an OO
> design, I'd think that trying to beat it into submission with the blunt
> instrument of a discriminated record is not the best approach. If it is
> an OO design, create an OO implementation with the correct Ada idiom for
> that - the tagged record and its surrounding package components.

Tagged types are one tool among many.  Use the tool that makes sense for
your problem.  If it's appropriate to use a tagged type, then by all means
do so.