5.2.1 Incremental Option Types

If one of the built-in options is almost what you need, you may be tempted to subclass it directly instead of using defoption, and only change what’s needed, After all, it’s Lisp. Lisp is a world of mess^D^D^D^Dfreedom.


defoption is not only a convenience wrapper around defclass. It also arranges for defsynopsis and defgroup to recognize your new option type. So please, do use it systematically.