1.0.23.56: special variables cause special cases in CLOS cleverness
[sbcl.git] / src / pcl / boot.lisp
index b056940..12467fa 100644 (file)
@@ -252,8 +252,9 @@ bootstrapping.
 
 (defun load-defgeneric (fun-name lambda-list source-location &rest initargs)
   (when (fboundp fun-name)
-    (style-warn "redefining ~S in DEFGENERIC" fun-name)
     (let ((fun (fdefinition fun-name)))
+      (warn 'sb-kernel:redefinition-with-defgeneric :name fun-name
+            :old fun :new-location source-location)
       (when (generic-function-p fun)
         (loop for method in (generic-function-initial-methods fun)
               do (remove-method fun method))
@@ -575,7 +576,27 @@ bootstrapping.
   (setf (gdefinition 'make-method-initargs-form)
         (symbol-function 'real-make-method-initargs-form)))
 
+;;; When bootstrapping PCL MAKE-METHOD-LAMBDA starts out as a regular
+;;; functions: REAL-MAKE-METHOD-LAMBDA set to the fdefinition of
+;;; MAKE-METHOD-LAMBDA. Once generic functions are born, the
+;;; REAL-MAKE-METHOD lambda is used as the body of the default method.
+;;; MAKE-METHOD-LAMBDA-INTERNAL is split out into a separate function
+;;; so that changing it in a live image is easy, and changes actually
+;;; take effect.
 (defun real-make-method-lambda (proto-gf proto-method method-lambda env)
+  (make-method-lambda-internal proto-gf proto-method method-lambda env))
+
+(unless (fboundp 'make-method-lambda)
+  (setf (gdefinition 'make-method-lambda)
+        (symbol-function 'real-make-method-lambda)))
+
+(defun declared-specials (declarations)
+  (loop for (declare . specifiers) in declarations
+        append (loop for specifier in specifiers
+                     when (eq 'special (car specifier))
+                     append (cdr specifier))))
+
+(defun make-method-lambda-internal (proto-gf proto-method method-lambda env)
   (declare (ignore proto-gf proto-method))
   (unless (and (consp method-lambda) (eq (car method-lambda) 'lambda))
     (error "The METHOD-LAMBDA argument to MAKE-METHOD-LAMBDA, ~S, ~
@@ -603,7 +624,6 @@ bootstrapping.
                         parameters
                         specializers))
                (slots (mapcar #'list required-parameters))
-               (calls (list nil))
                (class-declarations
                 `(declare
                   ;; These declarations seem to be used by PCL to pass
@@ -627,9 +647,12 @@ bootstrapping.
                   ;; KLUDGE: when I tried moving these to
                   ;; ADD-METHOD-DECLARATIONS, things broke.  No idea
                   ;; why.  -- CSR, 2004-06-16
-                  ,@(mapcar #'parameter-specializer-declaration-in-defmethod
-                            parameters
-                            specializers)))
+                  ,@(let ((specials (declared-specials declarations)))
+                      (mapcar (lambda (par spec)
+                                (parameter-specializer-declaration-in-defmethod
+                                 par spec specials env))
+                              parameters
+                              specializers))))
                (method-lambda
                 ;; Remove the documentation string and insert the
                 ;; appropriate class declarations. The documentation
@@ -678,29 +701,24 @@ bootstrapping.
               (walk-method-lambda method-lambda
                                   required-parameters
                                   env
-                                  slots
-                                  calls)
+                                  slots)
             (multiple-value-bind (walked-lambda-body
                                   walked-declarations
                                   walked-documentation)
                 (parse-body (cddr walked-lambda))
               (declare (ignore walked-documentation))
               (when (some #'cdr slots)
-                (multiple-value-bind (slot-name-lists call-list)
-                    (slot-name-lists-from-slots slots calls)
+                (let ((slot-name-lists (slot-name-lists-from-slots slots)))
                   (setq plist
                         `(,@(when slot-name-lists
                                   `(:slot-name-lists ,slot-name-lists))
-                            ,@(when call-list
-                                    `(:call-list ,call-list))
                             ,@plist))
                   (setq walked-lambda-body
                         `((pv-binding (,required-parameters
                                        ,slot-name-lists
                                        (load-time-value
                                         (intern-pv-table
-                                         :slot-name-lists ',slot-name-lists
-                                         :call-list ',call-list)))
+                                         :slot-name-lists ',slot-name-lists)))
                             ,@walked-lambda-body)))))
               (when (and (memq '&key lambda-list)
                          (not (memq '&allow-other-keys lambda-list)))
@@ -731,10 +749,6 @@ bootstrapping.
                           ,@(when plist `(plist ,plist))
                           ,@(when documentation `(:documentation ,documentation)))))))))))
 
-(unless (fboundp 'make-method-lambda)
-  (setf (gdefinition 'make-method-lambda)
-        (symbol-function 'real-make-method-lambda)))
-
 (defun real-make-method-specializers-form
     (proto-gf proto-method specializer-names env)
   (declare (ignore env proto-gf proto-method))
@@ -794,8 +808,12 @@ bootstrapping.
         (symbol-function 'real-unparse-specializer-using-class)))
 
 ;;; a helper function for creating Python-friendly type declarations
-;;; in DEFMETHOD forms
-(defun parameter-specializer-declaration-in-defmethod (parameter specializer)
+;;; in DEFMETHOD forms.
+;;;
+;;; We're too lazy to cons up a new environment for this, so we just pass in
+;;; the list of locally declared specials in addition to the old environment.
+(defun parameter-specializer-declaration-in-defmethod
+    (parameter specializer specials env)
   (cond ((and (consp specializer)
               (eq (car specializer) 'eql))
          ;; KLUDGE: ANSI, in its wisdom, says that
@@ -848,16 +866,10 @@ bootstrapping.
          '(ignorable))
         ((typep specializer 'eql-specializer)
          `(type (eql ,(eql-specializer-object specializer)) ,parameter))
-        ((var-globally-special-p parameter)
-         ;; KLUDGE: Don't declare types for global special variables
-         ;; -- our rebinding magic for SETQ cases don't work right
-         ;; there.
-         ;;
-         ;; FIXME: It would be better to detect the SETQ earlier and
-         ;; skip declarations for specials only when needed, not
-         ;; always.
-         ;;
-         ;; --NS 2004-10-14
+        ((or (var-special-p parameter env) (member parameter specials))
+         ;; Don't declare types for special variables -- our rebinding magic
+         ;; for SETQ cases don't work right there as SET, (SETF SYMBOL-VALUE),
+         ;; etc. make things undecidable.
          '(ignorable))
         (t
          ;; Otherwise, we can usually make Python very happy.
@@ -1011,7 +1023,7 @@ bootstrapping.
 
 (defstruct (fast-method-call (:copier nil))
   (function #'identity :type function)
-  pv-cell
+  pv
   next-method-call
   arg-info)
 (defstruct (constant-fast-method-call
@@ -1028,7 +1040,7 @@ bootstrapping.
 
 (defmacro invoke-fast-method-call (method-call restp &rest required-args+rest-arg)
   `(,(if restp 'apply 'funcall) (fast-method-call-function ,method-call)
-                                (fast-method-call-pv-cell ,method-call)
+                                (fast-method-call-pv ,method-call)
                                 (fast-method-call-next-method-call ,method-call)
                                 ,@required-args+rest-arg))
 
@@ -1038,7 +1050,7 @@ bootstrapping.
                                         &rest required-args)
   (macrolet ((generate-call (n)
                ``(funcall (fast-method-call-function ,method-call)
-                          (fast-method-call-pv-cell ,method-call)
+                          (fast-method-call-pv ,method-call)
                           (fast-method-call-next-method-call ,method-call)
                           ,@required-args
                           ,@(loop for x below ,n
@@ -1052,7 +1064,7 @@ bootstrapping.
        (0 ,(generate-call 0))
        (1 ,(generate-call 1))
        (t (multiple-value-call (fast-method-call-function ,method-call)
-            (values (fast-method-call-pv-cell ,method-call))
+            (values (fast-method-call-pv ,method-call))
             (values (fast-method-call-next-method-call ,method-call))
             ,@required-args
             (sb-c::%more-arg-values ,more-context 0 ,more-count))))))
@@ -1200,7 +1212,7 @@ bootstrapping.
             (nreq (car arg-info)))
        (if restp
            (apply (fast-method-call-function emf)
-                  (fast-method-call-pv-cell emf)
+                  (fast-method-call-pv emf)
                   (fast-method-call-next-method-call emf)
                   args)
            (cond ((null args)
@@ -1223,7 +1235,7 @@ bootstrapping.
                              :format-arguments nil)))
                  (t
                   (apply (fast-method-call-function emf)
-                         (fast-method-call-pv-cell emf)
+                         (fast-method-call-pv emf)
                          (fast-method-call-next-method-call emf)
                          args))))))
     (method-call
@@ -1429,7 +1441,7 @@ bootstrapping.
         when (eq key keyword)
           return tail))
 
-(defun walk-method-lambda (method-lambda required-parameters env slots calls)
+(defun walk-method-lambda (method-lambda required-parameters env slots)
   (let (;; flag indicating that CALL-NEXT-METHOD should be in the
         ;; method definition
         (call-next-method-p nil)
@@ -1492,7 +1504,7 @@ bootstrapping.
                           ;; another binding it won't have a %CLASS
                           ;; declaration anymore, and this won't get
                           ;; executed.
-                          (pushnew var parameters-setqd))))
+                          (pushnew var parameters-setqd :test #'eq))))
                     form)
                    ((and (eq (car form) 'function)
                          (cond ((eq (cadr form) 'call-next-method)
@@ -1568,8 +1580,10 @@ bootstrapping.
                         (generic-function-methods gf)
                         (find-method gf qualifiers specializers nil))))
       (when method
-        (style-warn "redefining ~S~{ ~S~} ~S in DEFMETHOD"
-                    gf-spec qualifiers specializers))))
+        (style-warn 'sb-kernel:redefinition-with-defmethod
+                    :generic-function gf-spec :old-method method
+                    :qualifiers qualifiers :specializers specializers
+                    :new-location source-location))))
   (let ((method (apply #'add-named-method
                        gf-spec qualifiers specializers lambda-list
                        :definition-source source-location
@@ -1609,11 +1623,10 @@ bootstrapping.
           (set-fun-name mff fast-name))))
     (when plist
       (let ((plist plist))
-        (let ((snl (getf plist :slot-name-lists))
-              (cl (getf plist :call-list)))
-          (when (or snl cl)
+        (let ((snl (getf plist :slot-name-lists)))
+          (when snl
             (setf (method-plist-value method :pv-table)
-                  (intern-pv-table :slot-name-lists snl :call-list cl))))))))
+                  (intern-pv-table :slot-name-lists snl))))))))
 \f
 (defun analyze-lambda-list (lambda-list)
   (flet (;; FIXME: Is this redundant with SB-C::MAKE-KEYWORD-FOR-ARG?
@@ -1695,9 +1708,6 @@ bootstrapping.
                                     (when (or allow-other-keys-p old-allowp)
                                       '(&allow-other-keys)))))
                  *))))
-
-(defun defgeneric-declaration (spec lambda-list)
-  `(ftype ,(ftype-declaration-from-lambda-list lambda-list spec) ,spec))
 \f
 ;;;; early generic function support
 
@@ -1910,14 +1920,19 @@ bootstrapping.
   (aver (= (symbol-value (intern (format nil "*SM-~A-INDEX*" s)))
            (!bootstrap-slot-index 'standard-reader-method s)
            (!bootstrap-slot-index 'standard-writer-method s)
-           (!bootstrap-slot-index 'standard-boundp-method s))))
+           (!bootstrap-slot-index 'standard-boundp-method s)
+           (!bootstrap-slot-index 'global-reader-method s)
+           (!bootstrap-slot-index 'global-writer-method s)
+           (!bootstrap-slot-index 'global-boundp-method s))))
+
+(define-symbol-macro *standard-method-classes*
+  (list *the-class-standard-method* *the-class-standard-reader-method*
+        *the-class-standard-writer-method* *the-class-standard-boundp-method*
+        *the-class-global-reader-method* *the-class-global-writer-method*
+        *the-class-global-boundp-method*))
 
 (defun safe-method-specializers (method)
-  (let ((standard-method-classes
-         (list *the-class-standard-method*
-               *the-class-standard-reader-method*
-               *the-class-standard-writer-method*
-               *the-class-standard-boundp-method*))
+  (let ((standard-method-classes *standard-method-classes*)
         (class (class-of method)))
     (if (member class standard-method-classes)
         (clos-slots-ref (get-slots method) *sm-specializers-index*)
@@ -1927,21 +1942,13 @@ bootstrapping.
     (and (typep mf '%method-function)
          (%method-function-fast-function mf))))
 (defun safe-method-function (method)
-  (let ((standard-method-classes
-         (list *the-class-standard-method*
-               *the-class-standard-reader-method*
-               *the-class-standard-writer-method*
-               *the-class-standard-boundp-method*))
+  (let ((standard-method-classes *standard-method-classes*)
         (class (class-of method)))
     (if (member class standard-method-classes)
         (clos-slots-ref (get-slots method) *sm-%function-index*)
         (method-function method))))
 (defun safe-method-qualifiers (method)
-  (let ((standard-method-classes
-         (list *the-class-standard-method*
-               *the-class-standard-reader-method*
-               *the-class-standard-writer-method*
-               *the-class-standard-boundp-method*))
+  (let ((standard-method-classes *standard-method-classes*)
         (class (class-of method)))
     (if (member class standard-method-classes)
         (clos-slots-ref (get-slots method) *sm-qualifiers-index*)
@@ -2008,6 +2015,7 @@ bootstrapping.
                         (package (symbol-package symbol)))
                    (and (or (eq package *pcl-package*)
                             (memq package (package-use-list *pcl-package*)))
+                        (not (eq package #.(find-package "CL")))
                         ;; FIXME: this test will eventually be
                         ;; superseded by the *internal-pcl...* test,
                         ;; above.  While we are in a process of
@@ -2044,6 +2052,7 @@ bootstrapping.
                                                               lambda-list-p)
                                             argument-precedence-order
                                             source-location
+                                            documentation
                                             &allow-other-keys)
   (declare (ignore keys))
   (cond ((and existing (early-gf-p existing))
@@ -2053,7 +2062,8 @@ bootstrapping.
         ((assoc spec *!generic-function-fixups* :test #'equal)
          (if existing
              (make-early-gf spec lambda-list lambda-list-p existing
-                            argument-precedence-order source-location)
+                            argument-precedence-order source-location
+                            documentation)
              (bug "The function ~S is not already defined." spec)))
         (existing
          (bug "~S should be on the list ~S."
@@ -2061,10 +2071,12 @@ bootstrapping.
         (t
          (pushnew spec *!early-generic-functions* :test #'equal)
          (make-early-gf spec lambda-list lambda-list-p nil
-                        argument-precedence-order source-location))))
+                        argument-precedence-order source-location
+                        documentation))))
 
 (defun make-early-gf (spec &optional lambda-list lambda-list-p
-                      function argument-precedence-order source-location)
+                      function argument-precedence-order source-location
+                      documentation)
   (let ((fin (allocate-standard-funcallable-instance
               *sgf-wrapper* *sgf-slots-init*)))
     (set-funcallable-instance-function
@@ -2080,15 +2092,18 @@ bootstrapping.
                          has not been set." fin)))))
     (setf (gdefinition spec) fin)
     (!bootstrap-set-slot 'standard-generic-function fin 'name spec)
-    (!bootstrap-set-slot 'standard-generic-function
-                         fin
-                         'source
-                         source-location)
+    (!bootstrap-set-slot 'standard-generic-function fin
+                         'source source-location)
+    (!bootstrap-set-slot 'standard-generic-function fin
+                         '%documentation documentation)
     (set-fun-name fin spec)
     (let ((arg-info (make-arg-info)))
       (setf (early-gf-arg-info fin) arg-info)
       (when lambda-list-p
-        (proclaim (defgeneric-declaration spec lambda-list))
+        (setf (info :function :type spec)
+              (specifier-type
+               (ftype-declaration-from-lambda-list lambda-list spec))
+              (info :function :where-from spec) :defined-method)
         (if argument-precedence-order
             (set-arg-info fin
                           :lambda-list lambda-list
@@ -2208,7 +2223,10 @@ bootstrapping.
   (prog1
       (apply #'reinitialize-instance existing all-keys)
     (when lambda-list-p
-      (proclaim (defgeneric-declaration fun-name lambda-list)))))
+      (setf (info :function :type fun-name)
+            (specifier-type
+             (ftype-declaration-from-lambda-list lambda-list fun-name))
+            (info :function :where-from fun-name) :defined-method))))
 
 (defun real-ensure-gf-using-class--null
        (existing
@@ -2224,7 +2242,10 @@ bootstrapping.
             (apply #'make-instance generic-function-class
                    :name fun-name all-keys))
     (when lambda-list-p
-      (proclaim (defgeneric-declaration fun-name lambda-list)))))
+      (setf (info :function :type fun-name)
+            (specifier-type
+             (ftype-declaration-from-lambda-list lambda-list fun-name))
+            (info :function :where-from fun-name) :defined-method))))
 \f
 (defun safe-gf-arg-info (generic-function)
   (if (eq (class-of generic-function) *the-class-standard-generic-function*)
@@ -2259,7 +2280,8 @@ bootstrapping.
             arg-info)))
 
 (defun early-make-a-method (class qualifiers arglist specializers initargs doc
-                            &key slot-name object-class method-class-function)
+                            &key slot-name object-class method-class-function
+                            definition-source)
   (let ((parsed ())
         (unparsed ()))
     ;; Figure out whether we got class objects or class names as the
@@ -2300,13 +2322,15 @@ bootstrapping.
                         initargs doc)
                   (when slot-name
                     (list :slot-name slot-name :object-class object-class
-                          :method-class-function method-class-function))))))
+                          :method-class-function method-class-function))
+                  (list :definition-source definition-source)))))
       (initialize-method-function initargs result)
       result)))
 
 (defun real-make-a-method
        (class qualifiers lambda-list specializers initargs doc
-        &rest args &key slot-name object-class method-class-function)
+        &rest args &key slot-name object-class method-class-function
+        definition-source)
   (if method-class-function
       (let* ((object-class (if (classp object-class) object-class
                                (find-class object-class)))
@@ -2322,6 +2346,7 @@ bootstrapping.
           (apply #'make-instance
                  (apply method-class-function object-class slot-definition
                         initargs)
+                 :definition-source definition-source
                  initargs)))
       (apply #'make-instance class :qualifiers qualifiers
              :lambda-list lambda-list :specializers specializers
@@ -2380,7 +2405,9 @@ bootstrapping.
   (setf (fifth (fifth early-method)) new-value))
 
 (defun early-add-named-method (generic-function-name qualifiers
-                               specializers arglist &rest initargs)
+                               specializers arglist &rest initargs
+                               &key documentation definition-source
+                               &allow-other-keys)
   (let* (;; we don't need to deal with the :generic-function-class
          ;; argument here because the default,
          ;; STANDARD-GENERIC-FUNCTION, is right for all early generic
@@ -2394,7 +2421,8 @@ bootstrapping.
     (setf (getf (getf initargs 'plist) :name)
           (make-method-spec gf qualifiers specializers))
     (let ((new (make-a-method 'standard-method qualifiers arglist
-                              specializers initargs ())))
+                              specializers initargs documentation
+                              :definition-source definition-source)))
       (when existing (remove-method gf existing))
       (add-method gf new))))