(defmethod raw-instance-allocator ((class standard-class))
'allocate-standard-instance)
-;;; These four functions work on std-instances and fsc-instances. These are
+;;; These three functions work on std-instances and fsc-instances. These are
;;; instances for which it is possible to change the wrapper and the slots.
;;;
;;; For these kinds of instances, most specified methods from the instance
;;; structure protocol are promoted to the implementation-specific class
;;; std-class. Many of these methods call these four functions.
-(defun set-wrapper (inst new)
- (cond ((std-instance-p inst)
- (setf (std-instance-wrapper inst) new))
- ((fsc-instance-p inst)
- (setf (fsc-instance-wrapper inst) new))
+(defun %swap-wrappers-and-slots (i1 i2)
+ (cond ((std-instance-p i1)
+ (let ((w1 (std-instance-wrapper i1))
+ (s1 (std-instance-slots i1)))
+ (setf (std-instance-wrapper i1) (std-instance-wrapper i2))
+ (setf (std-instance-slots i1) (std-instance-slots i2))
+ (setf (std-instance-wrapper i2) w1)
+ (setf (std-instance-slots i2) s1)))
+ ((fsc-instance-p i1)
+ (let ((w1 (fsc-instance-wrapper i1))
+ (s1 (fsc-instance-slots i1)))
+ (setf (fsc-instance-wrapper i1) (fsc-instance-wrapper i2))
+ (setf (fsc-instance-slots i1) (fsc-instance-slots i2))
+ (setf (fsc-instance-wrapper i2) w1)
+ (setf (fsc-instance-slots i2) s1)))
(t
(error "unrecognized instance type"))))
-
-(defun swap-wrappers-and-slots (i1 i2)
- (with-pcl-lock ;FIXME is this sufficient?
- (cond ((std-instance-p i1)
- (let ((w1 (std-instance-wrapper i1))
- (s1 (std-instance-slots i1)))
- (setf (std-instance-wrapper i1) (std-instance-wrapper i2))
- (setf (std-instance-slots i1) (std-instance-slots i2))
- (setf (std-instance-wrapper i2) w1)
- (setf (std-instance-slots i2) s1)))
- ((fsc-instance-p i1)
- (let ((w1 (fsc-instance-wrapper i1))
- (s1 (fsc-instance-slots i1)))
- (setf (fsc-instance-wrapper i1) (fsc-instance-wrapper i2))
- (setf (fsc-instance-slots i1) (fsc-instance-slots i2))
- (setf (fsc-instance-wrapper i2) w1)
- (setf (fsc-instance-slots i2) s1)))
- (t
- (error "unrecognized instance type")))))
\f
;;;; STANDARD-INSTANCE-ACCESS
(declaim (ftype (sfunction (t symbol) t) slot-value))
(defun slot-value (object slot-name)
- (let* ((wrapper (check-obsolete-instance/wrapper-of object))
+ (let* ((wrapper (valid-wrapper-of object))
(cell (find-slot-cell wrapper slot-name))
(location (car cell))
(value
(funcallable-standard-instance-access object location)))
((consp location)
(cdr location))
- ((eq t location)
- (return-from slot-value
- (slot-value-using-class (wrapper-class* wrapper) object (cddr cell))))
((not cell)
(return-from slot-value
(values (slot-missing (wrapper-class* wrapper) object slot-name
'slot-value))))
+ ((not location)
+ (return-from slot-value
+ (slot-value-using-class (wrapper-class* wrapper) object (cddr cell))))
(t
(bug "Bogus slot cell in SLOT-VALUE: ~S" cell)))))
(if (eq +slot-unbound+ value)
form))
(defun set-slot-value (object slot-name new-value)
- (let* ((wrapper (check-obsolete-instance/wrapper-of object))
+ (let* ((wrapper (valid-wrapper-of object))
(cell (find-slot-cell wrapper slot-name))
(location (car cell))
(type-check-function (cadr cell)))
new-value)))
((consp location)
(setf (cdr location) new-value))
- ((eq t location)
- (setf (slot-value-using-class (wrapper-class* wrapper) object (cddr cell))
- new-value))
((not cell)
(slot-missing (wrapper-class* wrapper) object slot-name 'setf new-value))
+ ((not location)
+ (setf (slot-value-using-class (wrapper-class* wrapper) object (cddr cell))
+ new-value))
(t
(bug "Bogus slot-cell in SET-SLOT-VALUE: ~S" cell))))
new-value)
form))
(defun slot-boundp (object slot-name)
- (let* ((wrapper (check-obsolete-instance/wrapper-of object))
+ (let* ((wrapper (valid-wrapper-of object))
(cell (find-slot-cell wrapper slot-name))
(location (car cell))
(value
(funcallable-standard-instance-access object location)))
((consp location)
(cdr location))
- ((eq t location)
- (return-from slot-boundp
- (slot-boundp-using-class (wrapper-class* wrapper) object (cddr cell))))
((not cell)
(return-from slot-boundp
(and (slot-missing (wrapper-class* wrapper) object slot-name
'slot-boundp)
t)))
+ ((not location)
+ (return-from slot-boundp
+ (slot-boundp-using-class (wrapper-class* wrapper) object (cddr cell))))
(t
(bug "Bogus slot cell in SLOT-VALUE: ~S" cell)))))
(not (eq +slot-unbound+ value))))
form))
(defun slot-makunbound (object slot-name)
- (let* ((wrapper (check-obsolete-instance/wrapper-of object))
+ (let* ((wrapper (valid-wrapper-of object))
(cell (find-slot-cell wrapper slot-name))
(location (car cell)))
(cond ((fixnump location)
+slot-unbound+)))
((consp location)
(setf (cdr location) +slot-unbound+))
- ((eq t location)
- (slot-makunbound-using-class (wrapper-class* wrapper) object (cddr cell)))
((not cell)
(slot-missing (wrapper-class* wrapper) object slot-name 'slot-makunbound))
+ ((not location)
+ (slot-makunbound-using-class (wrapper-class* wrapper) object (cddr cell)))
(t
(bug "Bogus slot-cell in SLOT-MAKUNBOUND: ~S" cell))))
object)
(let ((constructor (class-defstruct-constructor class)))
(if constructor
(funcall constructor)
- (allocate-standard-instance (class-wrapper class)))))
+ (error "Don't know how to allocate ~S" class))))
;;; FIXME: It would be nicer to have allocate-instance return
;;; uninitialized objects for conditions as well.
(declare (ignore initargs))
(error "Cannot allocate an instance of ~S." class)) ; So sayeth AMOP
+;;; AMOP says that CLASS-SLOTS signals an error for unfinalized classes.
+(defmethod class-slots :before ((class slot-class))
+ (unless (class-finalized-p class)
+ (error 'simple-reference-error
+ :format-control "~S called on ~S, which is not yet finalized."
+ :format-arguments (list 'class-slots class)
+ :references (list '(:amop :generic-function class-slots)))))
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