(in-package "SPECIALIZABLE")
(defclass extended-specializer (sb-mop:specializer)
- ((direct-methods :initform nil
- :accessor %specializer-direct-methods
- :reader specializer-direct-methods)))
+ ;; FIXME: this doesn't actually do quite what I wanted.
+ ((direct-methods-table :allocation :class
+ :initform nil :accessor direct-methods-table)))
+
+(defmethod sb-mop:add-direct-method ((specializer extended-specializer) method)
+ (let* ((table (direct-methods-table specializer))
+ (cell (assoc specializer table :test #'sb-pcl::same-specializer-p)))
+ (unless cell
+ (setf cell (cons specializer nil))
+ (push cell (direct-methods-table specializer)))
+ (push method (cdr cell))))
+
+(defmethod sb-mop:remove-direct-method ((specializer extended-specializer) method)
+ (let* ((table (direct-methods-table specializer))
+ (cell (assoc specializer table :test #'sb-pcl::same-specializer-p)))
+ (setf (cdr cell) (remove method (cdr cell)))))
+
+(defmethod sb-mop:specializer-direct-methods ((specializer extended-specializer))
+ (cdr (assoc specializer (direct-methods-table specializer)
+ :test #'sb-pcl::same-specializer-p)))
+(defmethod sb-mop:specializer-direct-generic-functions ((specializer extended-specializer))
+ (remove-duplicates (mapcar #'sb-mop:method-generic-function (sb-mop:specializer-direct-methods specializer))))
(defclass specializable-generic-function (standard-generic-function)
((extended-specializers :initform (make-hash-table :test 'equal)
;;; gf
;;; args))))
-;;; FIXME: this (and add/remove-direct-method) don't actually work
-;;; together, because two distinct calls to make-extended-specializer
-;;; return two distinct specializer objects. We need either to make
-;;; the extended specializers be interned, or to have them be
-;;; arbitrarily ephemeral but adjust specializer-direct-methods (and
-;;; implement specializer-direct-generic-functions) accordingly.
(defun make-extended-specializer (sname)
(destructuring-bind (kind &rest args) sname
(apply (or (get kind 'extended-specializer-parser)
'|This is not a generic function| ;fixme, see comment above
args)))
-(defmethod sb-mop:add-direct-method ((specializer extended-specializer) method)
- (pushnew method (%specializer-direct-methods specializer)))
-
-(defmethod sb-mop:remove-direct-method ((specializer extended-specializer) method)
- (setf (%specializer-direct-methods specializer)
- (remove method (specializer-direct-methods specializer))))
-
;;; from SBCL:
(defmethod sb-pcl:parse-specializer-using-class
((gf specializable-generic-function) (g class))
(sb-pcl::class-wrapper g))
+(defun first-arg-only-special-case (gf)
+ (let ((arg-info (sb-pcl::gf-arg-info gf)))
+ (and (>= (sb-pcl::arg-info-number-required arg-info) 1)
+ (every (lambda (x) (eql x t))
+ (cdr (sb-pcl::arg-info-metatypes arg-info))))))
+
;;; FIXME: in some kind of order, the discriminating function needs to handle:
;;; - argument count checking;
-;;; - keyword argument validity;
+;;; - DONE (in effective method) keyword argument validity;
;;; - DONE flushing the emf cache on method addition/removal
;;; - DONE (sort of, using wrappers/g-e-h-k) flushing the cache on class redefinition;
;;; - cache thread-safety.
+;;; - speed
+;;; - interaction with TRACE et al.
(defmethod sb-mop:compute-discriminating-function ((gf specializable-generic-function))
- (lambda (&rest args)
- (let* ((generalizers (mapcar (lambda (x) (generalizer-of-using-class gf x))
- (required-portion gf args)))
- (keys (mapcar (lambda (x) (generalizer-equal-hash-key gf x)) generalizers))
- (emfun (gethash keys (emf-table gf) nil)))
- (if emfun
- (sb-pcl::invoke-emf emfun args)
- (slow-method-lookup gf args generalizers)))))
+ (if (first-arg-only-special-case gf)
+ (lambda (&rest args)
+ (let* ((g (generalizer-of-using-class gf (car args)))
+ (k (generalizer-equal-hash-key gf g))
+ (emfun (gethash k (emf-table gf) nil)))
+ (if emfun
+ (sb-pcl::invoke-emf emfun args)
+ (slow-method-lookup gf args (cons g (mapcar (lambda (x) (generalizer-of-using-class gf x))
+ (cdr (required-portion gf args))))))))
+ (lambda (&rest args)
+ (let* ((generalizers (mapcar (lambda (x) (generalizer-of-using-class gf x))
+ (required-portion gf args)))
+ (keys (mapcar (lambda (x) (generalizer-equal-hash-key gf x)) generalizers))
+ (emfun (gethash keys (emf-table gf) nil)))
+ (if emfun
+ (sb-pcl::invoke-emf emfun args)
+ (slow-method-lookup gf args generalizers))))))
(defmethod reinitialize-instance :after ((gf specializable-generic-function) &key)
(clrhash (emf-table gf)))
(compute-applicable-methods-using-generalizers gf generalizers)
(if definitivep
(let* ((emfun
- (compute-effective-method-function gf applicable-methods))
+ (compute-effective-method-function gf applicable-methods))
(keys (mapcar (lambda (x) (generalizer-equal-hash-key gf x)) generalizers)))
- (setf (gethash keys (emf-table gf)) emfun)
+ (if (first-arg-only-special-case gf)
+ (setf (gethash (car keys) (emf-table gf)) emfun)
+ (setf (gethash keys (emf-table gf)) emfun))
(sb-pcl::invoke-emf emfun args))
- (sb-pcl::invoke-emf (compute-effective-method-function
+ (sb-pcl::invoke-emf (compute-effective-method-function
gf (sb-mop:compute-applicable-methods gf args))
args))))
(defun compute-effective-method-function (gf methods)
- (let* ((mc (sb-mop:generic-function-method-combination gf))
- (em (sb-mop:compute-effective-method gf mc methods)))
- (sb-pcl::make-effective-method-function gf em)))
+ (if (null methods)
+ (lambda (&rest args) (apply #'no-applicable-method gf args))
+ (let* ((mc (sb-mop:generic-function-method-combination gf))
+ (sb-pcl::*applicable-methods* methods)
+ (em (sb-mop:compute-effective-method gf mc methods)))
+ (sb-pcl::make-effective-method-function gf em))))
;; new, not in closette
(defgeneric generalizer-of-using-class (generic-function object))
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