Topic: object-oriented prototypes

Notes

A prototype is an example object with functional behavior and state. It is easy and natural to create new objects using the prototype as a template.

A prototype may act as a trait or class or as a prototype for cloning. Self and Cecil can enforce the distinctions between trait, prototype, and object.

With prototypes, delegation inheritance behaves different than embedding inheritance. Delegation calls another object's methods using this object's states. Embedding creates a copy of the super class's state. With prototypes and delegation, the inherited object changes if the original state or delegation link changes. (cbb 1/01)

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