What are the pros and cons of an Inside-Out Object Model?

Pros:

• Encapsulation of attributes: only the scope that defines the attributes can get at them.
• Inheritance always works: the implementation isn't dependent on how a super class is implemented.
• Multiple inheritance is potentially easier.

Cons:

• It's more complex, you need for instance a DESTROY function.
• By default, they don't work after splitting of threads, unless you set up a special CLONE method. (They should work fine if you only create objects after you've split up your threads).
• Due to the encapsulation, you will need to do extra work when serializing.
• There's far less documentation. "Everyone" still gets to learn hash based objects when learning OOP in Perl.

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