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Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!uhccux!munnari.oz.au!murtoa.cs.mu.oz.au!ditmela!latcs1!tanp
From: tanp@latcs1.oz (Tan Poh Lee)
Newsgroups: comp.lang.smalltalk,comp.lang.eiffel
Subject: Class an object?
Keywords: class
Message-ID: <6319@latcs1.oz>
Date: 7 Sep 89 23:21:49 GMT
Followup-To: comp.lang.smalltalk
Organization: Comp Sci, La Trobe Uni, Australia
Lines: 20

I like to have some clarification on several questions about class.

1. Is a class an object?

2. Does it have a unique system identifier like the object?

3. Object has a system/object identifier, value and associated methods.
   Is it right to say that a class have system identifier, value domain, 
   methods and a NAME?

4. Is a tuple object which consists of another tuple object (ie. only one
   composition level) regarded as a complex object? 
   An example:
	O1 : <name: 'Tom', age: '25', spouse: O4>
	O4 : <name: 'Mary', age: '23', spouse: O1>
   Is O1 a complex object? 

I am aware some object-oriented languages do not have class concept.
If you have any language in mind with respect to the answers of the
questions above,  please mention it. Thanks.