Is a class A type?

Because a class defines what you can do with objects of that class, a class defines a type . A class is more than that though, since it also provides a description of how the methods are implemented (something not implied by the type) and how the fields of the object are laid out.

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Is a class A type?

Because a class defines what you can do with objects of that class, a class defines a type . A class is more than that though, since it also provides a description of how the methods are implemented (something not implied by the type) and how the fields of the object are laid out.

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What is a built in class?

A built-in class is a class whose instances have restricted capabilities or special representations . Attempting to use defclass to define subclasses of a built-in class signals an error of type error. Calling make-instance to create an instance of a built-in class signals an error of type error.

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