;;;; ANSI CL condition for unbound slots
(define-condition unbound-slot (cell-error)
- ((instance :reader unbound-slot-instance :initarg :instance)
- (slot :reader unbound-slot-slot :initarg :slot))
+ ((instance :reader unbound-slot-instance :initarg :instance))
(:report (lambda (condition stream)
(format stream "The slot ~S is unbound in the object ~S."
- (unbound-slot-slot condition)
+ (cell-error-name condition)
(unbound-slot-instance condition)))))
(defmethod wrapper-fetcher ((class standard-class))
(t
(error "unrecognized instance type")))))
\f
-(defun get-class-slot-value-1 (object wrapper slot-name)
- (let ((entry (assoc slot-name (wrapper-class-slots wrapper))))
- (if (null entry)
- (slot-missing (wrapper-class wrapper) object slot-name 'slot-value)
- (if (eq (cdr entry) +slot-unbound+)
- (slot-unbound (wrapper-class wrapper) object slot-name)
- (cdr entry)))))
-
-(defun set-class-slot-value-1 (new-value object wrapper slot-name)
- (let ((entry (assoc slot-name (wrapper-class-slots wrapper))))
- (if (null entry)
- (slot-missing (wrapper-class wrapper)
- object
- slot-name
- 'setf
- new-value)
- (setf (cdr entry) new-value))))
-
-(defmethod class-slot-value ((class std-class) slot-name)
- (let ((wrapper (class-wrapper class))
- (prototype (class-prototype class)))
- (get-class-slot-value-1 prototype wrapper slot-name)))
-
-(defmethod (setf class-slot-value) (nv (class std-class) slot-name)
- (let ((wrapper (class-wrapper class))
- (prototype (class-prototype class)))
- (set-class-slot-value-1 nv prototype wrapper slot-name)))
-\f
(defun find-slot-definition (class slot-name)
(dolist (slot (class-slots class) nil)
(when (eql slot-name (slot-definition-name slot))
(return slot))))
+(declaim (ftype (sfunction (t symbol) t) slot-value))
(defun slot-value (object slot-name)
(let* ((class (class-of object))
(slot-definition (find-slot-definition class slot-name)))
(if (null slot-definition)
- (slot-missing class object slot-name 'slot-value)
+ (values (slot-missing class object slot-name 'slot-value))
(slot-value-using-class class object slot-definition))))
(define-compiler-macro slot-value (&whole form object slot-name)
(let* ((class (class-of object))
(slot-definition (find-slot-definition class slot-name)))
(if (null slot-definition)
- (slot-missing class object slot-name 'setf new-value)
+ (progn (slot-missing class object slot-name 'setf new-value)
+ new-value)
(setf (slot-value-using-class class object slot-definition)
new-value))))
(let* ((class (class-of object))
(slot-definition (find-slot-definition class slot-name)))
(if (null slot-definition)
- (slot-missing class object slot-name 'slot-boundp)
+ (not (not (slot-missing class object slot-name 'slot-boundp)))
(slot-boundp-using-class class object slot-definition))))
(setf (gdefinition 'slot-boundp-normal) #'slot-boundp)
(slot-definition (find-slot-definition class slot-name)))
(if (null slot-definition)
(slot-missing class object slot-name 'slot-makunbound)
- (slot-makunbound-using-class class object slot-definition))))
+ (slot-makunbound-using-class class object slot-definition))
+ object))
(defun slot-exists-p (object slot-name)
(let ((class (class-of object)))
(slotd standard-effective-slot-definition))
(check-obsolete-instance object)
(let* ((location (slot-definition-location slotd))
- (value (typecase location
- (fixnum
- (cond ((std-instance-p object)
- (clos-slots-ref (std-instance-slots object)
- location))
- ((fsc-instance-p object)
- (clos-slots-ref (fsc-instance-slots object)
- location))
- (t (error "unrecognized instance type"))))
- (cons
- (cdr location))
- (t
- (error "~@<The slot ~S has neither :INSTANCE nor :CLASS ~
- allocation, so it can't be read by the default ~
- ~S method.~@:>"
- slotd 'slot-value-using-class)))))
+ (value
+ (typecase location
+ (fixnum
+ (cond ((std-instance-p object)
+ (clos-slots-ref (std-instance-slots object)
+ location))
+ ((fsc-instance-p object)
+ (clos-slots-ref (fsc-instance-slots object)
+ location))
+ (t (bug "unrecognized instance type in ~S"
+ 'slot-value-using-class))))
+ (cons
+ (cdr location))
+ (t
+ (instance-structure-protocol-error slotd
+ 'slot-value-using-class)))))
(if (eq value +slot-unbound+)
- (slot-unbound class object (slot-definition-name slotd))
+ (values (slot-unbound class object (slot-definition-name slotd)))
value)))
(defmethod (setf slot-value-using-class)
((fsc-instance-p object)
(setf (clos-slots-ref (fsc-instance-slots object) location)
new-value))
- (t (error "unrecognized instance type"))))
+ (t (bug "unrecognized instance type in ~S"
+ '(setf slot-value-using-class)))))
(cons
(setf (cdr location) new-value))
(t
- (error "~@<The slot ~S has neither :INSTANCE nor :CLASS allocation, ~
- so it can't be written by the default ~S method.~:@>"
- slotd '(setf slot-value-using-class))))))
+ (instance-structure-protocol-error slotd
+ '(setf slot-value-using-class))))))
(defmethod slot-boundp-using-class
((class std-class)
(slotd standard-effective-slot-definition))
(check-obsolete-instance object)
(let* ((location (slot-definition-location slotd))
- (value (typecase location
- (fixnum
- (cond ((std-instance-p object)
+ (value
+ (typecase location
+ (fixnum
+ (cond ((std-instance-p object)
(clos-slots-ref (std-instance-slots object)
location))
- ((fsc-instance-p object)
- (clos-slots-ref (fsc-instance-slots object)
- location))
- (t (error "unrecognized instance type"))))
- (cons
- (cdr location))
- (t
- (error "~@<The slot ~S has neither :INSTANCE nor :CLASS ~
- allocation, so it can't be read by the default ~S ~
- method.~@:>"
- slotd 'slot-boundp-using-class)))))
+ ((fsc-instance-p object)
+ (clos-slots-ref (fsc-instance-slots object)
+ location))
+ (t (bug "unrecognized instance type in ~S"
+ 'slot-boundp-using-class))))
+ (cons
+ (cdr location))
+ (t
+ (instance-structure-protocol-error slotd
+ 'slot-boundp-using-class)))))
(not (eq value +slot-unbound+))))
(defmethod slot-makunbound-using-class
((fsc-instance-p object)
(setf (clos-slots-ref (fsc-instance-slots object) location)
+slot-unbound+))
- (t (error "unrecognized instance type"))))
+ (t (bug "unrecognized instance type in ~S"
+ 'slot-makunbound-using-class))))
(cons
(setf (cdr location) +slot-unbound+))
(t
- (error "~@<The slot ~S has neither :INSTANCE nor :CLASS allocation, ~
- so it can't be written by the default ~S method.~@:>"
- slotd 'slot-makunbound-using-class))))
+ (instance-structure-protocol-error slotd
+ 'slot-makunbound-using-class))))
object)
(defmethod slot-value-using-class
+ ((class condition-class)
+ (object condition)
+ (slotd condition-effective-slot-definition))
+ (let ((fun (slot-definition-reader-function slotd)))
+ (declare (type function fun))
+ (funcall fun object)))
+
+(defmethod (setf slot-value-using-class)
+ (new-value
+ (class condition-class)
+ (object condition)
+ (slotd condition-effective-slot-definition))
+ (let ((fun (slot-definition-writer-function slotd)))
+ (declare (type function fun))
+ (funcall fun new-value object)))
+
+(defmethod slot-boundp-using-class
+ ((class condition-class)
+ (object condition)
+ (slotd condition-effective-slot-definition))
+ (let ((fun (slot-definition-boundp-function slotd)))
+ (declare (type function fun))
+ (funcall fun object)))
+
+(defmethod slot-makunbound-using-class ((class condition-class) object slot)
+ (error "attempt to unbind slot ~S in condition object ~S."
+ slot object))
+
+(defmethod slot-value-using-class
((class structure-class)
(object structure-object)
(slotd structure-effective-slot-definition))
(value (funcall function object)))
(declare (type function function))
(if (eq value +slot-unbound+)
- (slot-unbound class object (slot-definition-name slotd))
+ (values (slot-unbound class object (slot-definition-name slotd)))
value)))
(defmethod (setf slot-value-using-class)
instance))
(defmethod slot-unbound ((class t) instance slot-name)
- (error 'unbound-slot :slot slot-name :instance instance))
+ (error 'unbound-slot :name slot-name :instance instance))
(defun slot-unbound-internal (instance position)
- (slot-unbound (class-of instance) instance
- (etypecase position
- (fixnum
- (nth position
- (wrapper-instance-slots-layout (wrapper-of instance))))
- (cons
- (car position)))))
+ (values
+ (slot-unbound
+ (class-of instance)
+ instance
+ (etypecase position
+ (fixnum
+ (nth position (wrapper-instance-slots-layout (wrapper-of instance))))
+ (cons
+ (car position))))))
\f
+;;; FIXME: AMOP says that allocate-instance imples finalize-inheritance
+;;; if the class is not yet finalized, but we don't seem to be taking
+;;; care of this for non-standard-classes.x
(defmethod allocate-instance ((class standard-class) &rest initargs)
(declare (ignore initargs))
- (unless (class-finalized-p class) (finalize-inheritance class))
+ (unless (class-finalized-p class)
+ (finalize-inheritance class))
(allocate-standard-instance (class-wrapper class)))
(defmethod allocate-instance ((class structure-class) &rest initargs)
(let ((constructor (class-defstruct-constructor class)))
(if constructor
(funcall constructor)
- (error "can't allocate an instance of class ~S" (class-name class)))))
+ (allocate-standard-instance (class-wrapper class)))))
+
+;;; FIXME: It would be nicer to have allocate-instance return
+;;; uninitialized objects for conditions as well.
+(defmethod allocate-instance ((class condition-class) &rest initargs)
+ (declare (ignore initargs))
+ (make-condition (class-name class)))
+
+(defmethod allocate-instance ((class built-in-class) &rest initargs)
+ (declare (ignore initargs))
+ (error "Cannot allocate an instance of ~S." class)) ; So sayeth AMOP