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From: Ludovic Brenta <ludovic@ludovic-brenta.org>
Newsgroups: comp.lang.ada
Subject: Re: Inherited Methods and such
Date: Mon, 17 Sep 2007 08:11:48 -0700
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Date: 2007-09-17T08:11:48-07:00
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Shaun Patterson wrote:
> I'm trying to get sub-packages to override superclass methods.

Packages are not classes. IIUC, what you want is dynamic dispatching:
Base.Do should call whichever version of Test_1 and Test_2 is
applicable for the current invocation.

In Ada, you get dynamic dispatching by combining tagged types and
primitive operations on these types.

See http://en.wikibooks.org/wiki/Ada_Programming/Object_Orientation

If you come from C++:

class -> tagged type
* -> class
namespace -> package (very roughly)
virtual method -> primitive operation
static method -> class-wide operation

In Ada, a "class" is the set consisting of a tagged type and all types
derived from it.

HTH

--
Ludovic Brenta.