Re: friend classes in ada95

["Jean-Pierre Rosen" <rosen.adalog@wanadoo.fr>]

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Ray Blaak <blaak@infomatch.com> a �crit dans le message :
m3hfcxjt22.fsf@ns58.infomatch.bc.ca...
> OO programming being essentially about ADTs covers the most important and
> worthwhile point. What makes OO programming different from ADTs, in least
in my
> opinion, is language support for inheritance and polymorphism.

Certainly not. What you describe is classification, which is one way of
organizing objects. Composition is another one, and there might be others to
be invented. I would rather say that what makes OO is the fact that ADT's
represent and are modelled after real-life objects, i.e. that a program is
no more defined as a sequence of actions to be performed by a computer, but
as a representation, a modelization, of the real world. FWIW.

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           J-P. Rosen (Rosen.Adalog@wanadoo.fr)
Visit Adalog's web site at http://pro.wanadoo.fr/adalog