+ (declare (type (member :macro :function) kind))
+ (fresh-line s)
+ (pprint-logical-block (s nil)
+ (ecase kind
+ (:macro (format s "Macro-function: ~S" x))
+ (:function (if name
+ (format s "Function: ~S" x)
+ (format s "~S is a function." x))))
+ (format s "~@:_~@<Its associated name (as in ~S) is ~2I~_~S.~:>"
+ 'function-lambda-expression
+ (nth-value 2 (function-lambda-expression x)))
+ (case (widetag-of x)
+ (#.sb-vm:closure-header-widetag
+ (%describe-fun-compiled (%closure-fun x) s kind name)
+ (format s "~&Its closure environment is:")
+ (loop for value in (%closure-values x)
+ for i = 0 then (1+ i)
+ do (format s "~& ~S: ~S" i value)))
+ (#.sb-vm:simple-fun-header-widetag
+ (%describe-fun-compiled x s kind name))
+ (#.sb-vm:funcallable-instance-header-widetag
+ ;; Only STANDARD-GENERIC-FUNCTION would be handled here, but
+ ;; since it has its own DESCRIBE-OBJECT method, it should've been
+ ;; picked off before getting here. So hopefully we never get here.
+ (format s "~@:_It is an unknown type of funcallable instance."))
+ (t
+ (format s "~@:_It is an unknown type of function."))))
+ (terpri s))
+
+;; Describe an interpreted function.
+#+sb-eval
+(defun %describe-interpreted-fun (x s &optional (kind :function) (name nil))
+ (declare (type sb-eval:interpreted-function x))
+ (declare (type stream s))
+ (declare (type (member :macro :function) kind))