Re: worth the hassle?

[Stephen Leake <stephen.a.leake.1@gsfc.nasa.gov>]

"chris.danx" <spamoff.danx@ntlworld.com> writes:

> hmm, problem...
> <snip code>
> 
> Let's say we have 2 types (a_type & b_type) derived from a single type,
> base_type and we want to store objects of all three types in the *same
> list*.  How do we code assign for this situation?  What happens if the
> derved classes are not known before hand?  Is it even possible to put the
> all the types in the same list?

Use a class-wide access type in the list:

type Element_Access is access all Element_Type'class;

To mangle someone else's quote: "there is almost no problem in
computer science that a layer of indirection won't solve".

-- 
-- Stephe