From: Ilias Lazaridis <ilias@...>
Date: 2005-04-05T21:34:50+09:00
Subject: [EVALUATION] - E03b - The Ruby Object Model

[EVALUATION] - E03 - jamLang Evaluation Case Applied to Ruby
http://groups-beta.google.com/group/comp.lang.ruby/msg/412943e7c6ed6968

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In the above thread, I had some problems with the Ruby Object Model.

I currently try to create an UML diagramm, to add this to the evaluation 
result:

http://lazaridis.com/case/lang/ruby.html

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The existing documentation seems at least missleading, if not wrong:

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cmd:> ri Class


"Classes, modules, and objects are interrelated. In the diagram that
follows, the arrows represent inheritance, and the parentheses
meta-classes. All metaclasses are instances of the class `Class'."

                           +------------------+
                           |                  |
             Object---->(Object)              |
              ^  ^        ^  ^                |
              |  |        |  |                |
              |  |  +-----+  +---------+      |
              |  |  |                  |      |
              |  +-----------+         |      |
              |     |        |         |      |
       +------+     |     Module--->(Module)  |
       |            |        ^         ^      |
  OtherClass-->(OtherClass)  |         |      |
                             |         |      |
                           Class---->(Class)  |
                             ^                |
                             |                |
                             +----------------+

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this can be drawn like this:

          otherClass--->(OtherClass)
                 |         |
                 |         |
                 v         v
              Object--->(Object)
                 ^        ^^
                 |        ||
                 |       / |
                 |      /  |
                 |     /   |
                 |    /    |
              Module--->(Module)
                 ^  /      ^
                 | /       |
                 |/        |
               Class---->(Class)

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i've played within IRB, but:

I cannot access any of the metaclasses

the same in the documentation: no metaclasses

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Any suggestions / clarifications?

..

-- 
http://lazaridis.com