From: hal9000@...
Date: 2000-06-19T22:34:30+00:00
Subject: [ruby-talk:03531] Ruby classes and inheritance



Pardon me for referring to other languages
such as C++ and Java in comparison with Ruby.
I like Ruby, but currently it is C++ that is
putting food on my table...

Anyway, I was thinking:

In C++, there is the concept of an "abstract
class" that has "pure virtual" functions (methods).
That is, the methods are specifically and purposely
NOT defined in the parent, and as a result: 1. They
MUST be defined in the child, and 2. the class can
be used only for inheritance, not instantiated.

There does not seem to be any parallel concept in
Ruby. On the other hand, maybe I don't need it.

I seem to remember a time or two it seemed appropriate
in C++ to do uch a thing, but I can't think of an
example.

Comments, anyone? I've thoroughly confused myself.

Hal

--
Hal Fulton


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