-
-(defun make-internal-reader-method-function (class-name slot-name)
- (list* :method-spec `(internal-reader-method ,class-name ,slot-name)
- (make-method-function
- (lambda (instance)
- (let ((wrapper (get-instance-wrapper-or-nil instance)))
- (if wrapper
- (let* ((class (wrapper-class* wrapper))
- (index (or (instance-slot-index wrapper slot-name)
- (assq slot-name
- (wrapper-class-slots wrapper)))))
- (typecase index
- (fixnum
- (let ((value (clos-slots-ref (get-slots instance)
- index)))
- (if (eq value +slot-unbound+)
- (values (slot-unbound (class-of instance)
- instance
- slot-name))
- value)))
- (cons
- (let ((value (cdr index)))
- (if (eq value +slot-unbound+)
- (values (slot-unbound (class-of instance)
- instance
- slot-name))
- value)))
- (t
- (error "~@<The wrapper for class ~S does not have ~
- the slot ~S~@:>"
- class slot-name))))
- (slot-value instance slot-name)))))))