5.9 Summary

In this chapter, we covered the following:

• We showed how to use class inheritance.

• We introduced the terminology of classes: direct subclass, subclass, direct superclass, superclass, direct instance, indirect instance, instance, subtype, and supertype.

• We showed how method dispatch works for a generic function with one argument, when there is more than one applicable method.

• We created a generic function explicitly (with define generic).

• We used next-method to call the next most specific method.