+ ;; (famous last words:
+ ;; 1. Don't worry, I know what I'm doing.
+ ;; 2. You and what army?
+ ;; 3. If you were as smart as you think you are, you
+ ;; wouldn't be a cop.
+ ;; This is case #1.:-) Even if SYM hasn't been defined yet,
+ ;; it must be an implementation function, or we we wouldn't
+ ;; have expanded into it. So declare SYM as defined, so that
+ ;; even if it hasn't been defined yet, the user doesn't get
+ ;; obscure warnings about undefined internal implementation
+ ;; functions like HAIRY-MAKE-instance-name.
+ (sb-kernel:become-defined-fun-name sym)