-;;; (called by SB!C::%DEFMACRO)
-(eval-when (:compile-toplevel :load-toplevel :execute)
- (defun sb!c::%%defmacro (name definition doc)
- ;; Old note (ca. 1985, maybe:-): "Eventually %%DEFMACRO should deal with
- ;; clearing old compiler information for the functional value."
- (clear-info :function :where-from name)
- ;; FIXME: It would be nice to warn about DEFMACRO of an
- ;; already-defined macro, but that's slightly hard to do because
- ;; in common usage DEFMACRO is defined at compile time and then
- ;; redefined at load time. We'd need to make a distinction between
- ;; the defined-at-compile-time state and the defined-at-load-time
- ;; state to make this work. (Trying to warn about duplicate DEFTYPEs
- ;; runs into the same problem.)
- #+nil (when (sb!xc:macro-function name)
- (style-warn "redefining ~S in DEFMACRO" name))
- (setf (sb!xc:macro-function name) definition
- (fdocumentation name 'function) doc)
- name))
+(macrolet
+ ((def (times set-p)
+ `(eval-when (,@times)
+ (defun sb!c::%defmacro (name definition lambda-list doc debug-name)
+ ;; old note (ca. 1985, maybe:-): "Eventually %%DEFMACRO
+ ;; should deal with clearing old compiler information for
+ ;; the functional value."
+ ,@(unless set-p
+ '((declare (ignore lambda-list debug-name))))
+ (ecase (info :function :kind name)
+ ((nil))
+ (:function
+ ;; (remhash name *free-funs*)
+ (undefine-fun-name name)
+ (style-warn
+ "~S is being redefined as a macro when it was ~
+ previously ~(~A~) to be a function."
+ name
+ (info :function :where-from name)))
+ (:macro)
+ (:special-form
+ (error "The special form ~S can't be redefined as a macro."
+ name)))
+ (clear-info :function :where-from name)
+ ;; FIXME: It would be nice to warn about DEFMACRO of an
+ ;; already-defined macro, but that's slightly hard to do
+ ;; because in common usage DEFMACRO is defined at compile
+ ;; time and then redefined at load time. We'd need to make a
+ ;; distinction between the defined-at-compile-time state and
+ ;; the defined-at-load-time state to make this work. (Trying
+ ;; to warn about duplicate DEFTYPEs runs into the same
+ ;; problem.)
+ #+nil (when (sb!xc:macro-function name)
+ ;; Someday we could check for macro arguments
+ ;; being incompatibly redefined. Doing this right
+ ;; will involve finding the old macro lambda-list
+ ;; and comparing it with the new one.
+ (style-warn "redefining ~S in DEFMACRO" name))
+ (setf (sb!xc:macro-function name) definition
+ (fdocumentation name 'function) doc)
+ ,(when set-p
+ `(case (widetag-of definition)
+ (#.sb!vm:closure-header-widetag
+ (setf (%simple-fun-arglist (%closure-fun definition))
+ lambda-list
+ (%simple-fun-name (%closure-fun definition))
+ debug-name))
+ (#.sb!vm:simple-fun-header-widetag
+ (setf (%simple-fun-arglist definition) lambda-list
+ (%simple-fun-name definition) debug-name))))
+ name))))
+ (progn
+ (def (:load-toplevel :execute) #-sb-xc-host t #+sb-xc-host nil)
+ (def (#-sb-xc :compile-toplevel) nil)))