+ (let ((class (find-class specializer nil)))
+ (if class
+ `(type ,(class-name class) ,parameter)
+ (progn
+ ;; we can get here, and still not have a failure
+ ;; case, by doing MOP programming like (PROGN
+ ;; (ENSURE-CLASS 'FOO) (DEFMETHOD BAR ((X FOO))
+ ;; ...)). Best to let the user know we haven't
+ ;; been able to extract enough information:
+ (style-warn
+ "~@<can't find type for presumed class ~S in ~S.~@:>"
+ specializer
+ 'parameter-specializer-declaration-in-defmethod)
+ '(ignorable))))))))))