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From: ForthNet@willett.pgh.pa.us (ForthNet articles from GEnie)
Newsgroups: comp.lang.forth
Subject: NEON/Object Oriented Forth/OOF
Message-ID: <1748.UUL1.3#5129@willett.pgh.pa.us>
Date: 16 Sep 90 01:40:23 GMT
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Category 18,  Topic 69
Message 82        Sat Sep 15, 1990
GARY-S                       at 07:24 EDT
 
 
 Perhaps it might be to everyone's mutual advantage to determine where
 agreement and common ground may be found in this Object Oriented
 discussion. Perhaps it might even be worthwhile to quantify the basic
 concepts of just 'what is Object Oriented Programming'.

 Tim Korson and John D. McGregor in CACM, Vol 33, No 9, pp 38...
 maintain there are but five concepts that clearly define Object Oriented
 Programming. These are as follows:

   o  Objects - the basic run time entities that occupy memory and
                have an associated address

   o  Classes - a set of possible objects, ideally with implementation
                details unique to the class

   o  Inheritance - relation between classes that allows for the definition
                and implementation of one class to be based on that of
                existing class(es)

   o  Polymorphism - the ability to take more than one form. In OOP this
                means the a polymorphic reference may, over time, refer
                to more than one class

   o  Dynamic Binding - in essence, the nature of a proceedure call is not
                known (predefined) until the moment of call at runtime


 Korson and McGregor further maintaion of the five concepts only one,
 inheritance, is a unique contributor of the paradigm.

 Do all the contributers to the OOP/OOF discussion (?) in c.l.f. find the
 above reasonable and acceptible basic principals ?

  Gary

    ___        _ (Gary Smith)texbell!attctc!blackbox!bl133!lrark!glsrk!gars *
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