- (,the-slot-name (eql ',slot-name)))
- (declare (ignore ,the-class))
- (setf (slot-value ,the-instance ,the-slot-name)
- (,reader ,@keys)))))
-
-
-(defparameter *queued-definitions-pathname*
- (make-pathname :directory '(:absolute "tmp")
- :name (format nil "hyperobject-def-~d" (get-universal-time))
- :type "lisp"))
-(defparameter *queued-definitions-stream* nil)
-
-(defun add-definition (def)
- (unless *queued-definitions-stream*
- (setq *queued-definitions-stream* (open *queued-definitions-pathname*
- :direction :output
- :if-exists :supersede))
- (format *queued-definitions-stream* "(in-package #:hyperobject)~%"))
- (format *queued-definitions-stream* "~A~%" def))
-
-(defun process-queued-definitions ()
- (when *queued-definitions-stream*
- (close *queued-definitions-stream*)
- (compile-file *queued-definitions-pathname*)
- (load (compile-file-pathname *queued-definitions-pathname*))
-;; (delete-file *queued-definitions-pathname*)
-;; (delete-file (compile-file-pathname *queued-definitions-pathname*))
- (setq *queued-definitions-stream* nil)))
+ (,the-slot-name (eql ',slot-name)))
+ (declare (ignore ,the-class))
+ (setf (slot-value ,the-instance ,the-slot-name)
+ (,reader ,@keys)))))
+
+#+lispworks
+(defun intern-eql-specializer (slot)
+ `(eql ,slot))
+
+#+(or sbcl cmu lispworks)
+(defun ensure-lazy-reader (class-name slot-name reader &rest reader-keys)
+ (let ((keys nil)
+ (gf (ensure-generic-function 'slot-unbound)))
+ (dolist (key reader-keys)
+ (push (list 'slot-value 'the-instance (list 'quote key)) keys))
+ (setq keys (nreverse keys))
+ (multiple-value-bind (method-lambda init-args-values)
+ (make-method-lambda
+ gf
+ (class-prototype (generic-function-method-class gf))
+ #-lispworks
+ `(lambda (the-class the-instance the-slot-name)
+ (declare (ignore the-class))
+ (setf (slot-value the-instance the-slot-name) (,reader ,@keys)))
+ #+lispworks
+ '(the-class the-instance the-slot-name)
+ #+lispworks
+ nil
+ #+lispworks
+ `(setf (slot-value the-instance the-slot-name) (,reader ,@keys))
+ nil)
+ (add-method gf
+ (apply
+ #'make-instance (generic-function-method-class gf)
+ ':specializers (list (class-of (find-class class-name))
+ (find-class class-name)
+ (intern-eql-specializer slot-name))
+ ':lambda-list '(the-class the-instance the-slot-name)
+ ':function (compile nil method-lambda)
+ init-args-values)))))