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> From: Booth Martin
>
> Joe, help illuminate please.  Windmill tilting is for lesser men.
>     "Hans. Information hiding is an OO concept. Period."  so, hiding
> information is both unique to and a requirement of OO?

Nope, not unique.  But definitely a requirement of all OO design.  Every
single text on OO design, and every prominent proponent of OO, from Djikstra
to Stroustrup, talks about information hiding as a primary concept of
abstract data types.  And ADTs are the fundamental building block of OO.

Ada is NOT an OO language, it is a hybrid, like C++.  Smalltalk, Eiffel,
Java and Simula are.  Object notions include classes, inheritance,
information hiding and dynamic binding.

Interestingly enough, the paragraph above is not my opinion.  It is the
opinion of the Carnegie Mellon Software Engineering Institute.

Please refer to the following page:

http://www.sei.cmu.edu/str/descriptions/oopl_body.html

Is Carnegie Mellon non-windmill enough for you, Booth?  If not, try Bertrand
Meyer's Objects by Design.

Joe


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