0.8.16.23:

[sbcl.git] / tests / mop.impure.lisp

diff --git a/tests/mop.impure.lisp b/tests/mop.impure.lisp
index d682450..648b43b 100644 (file)
--- a/tests/mop.impure.lisp
+++ b/tests/mop.impure.lisp
@@ -286,5 +286,50 @@
   (funcall fun)
   (assert (= *special-ssvuc-counter-2* 1)))
 \f
+;;; vicious metacycle detection and resolution wasn't good enough: it
+;;; didn't take account that the slots (and hence the slot readers)
+;;; might be inherited from superclasses.  This example, due to Bruno
+;;; Haible, also tests programmatic addition of accessors.
+(defclass auto-accessors-direct-slot-definition-class (standard-class)
+  ((containing-class-name :initarg :containing-class-name)))
+(defmethod validate-superclass
+    ((c1 auto-accessors-direct-slot-definition-class) (c2 standard-class))
+  t)
+(defclass auto-accessors-class (standard-class)
+  ())
+(defmethod direct-slot-definition-class ((class auto-accessors-class)
+                                        &rest initargs)
+  (let ((dsd-class-name (gensym)))
+    (sb-pcl:ensure-class
+     dsd-class-name
+     :metaclass 'auto-accessors-direct-slot-definition-class
+     :direct-superclasses (list (find-class 'standard-direct-slot-definition))
+     :containing-class-name (class-name class))
+    (eval `(defmethod initialize-instance :after ((dsd ,dsd-class-name)
+                                                 &rest args)
+           (when (and (null (slot-definition-readers dsd))
+                      (null (slot-definition-writers dsd)))
+             (let* ((containing-class-name
+                     (slot-value (class-of dsd) 'containing-class-name))
+                    (accessor-name
+                     (intern
+                      (concatenate 'string
+                                   (symbol-name containing-class-name)
+                                   "-"
+                                   (symbol-name (slot-definition-name dsd)))
+                      (symbol-package containing-class-name))))
+               (setf (slot-definition-readers dsd) (list accessor-name))
+               (setf (slot-definition-writers dsd)
+                     (list (list 'setf accessor-name)))))))
+    (find-class dsd-class-name)))
+(defmethod validate-superclass ((c1 auto-accessors-class) (c2 standard-class))
+  t)
+(defclass testclass15 ()
+  ((x :initarg :x) (y))
+  (:metaclass auto-accessors-class))
+(let ((inst (make-instance 'testclass15 :x 12)))
+  (assert (equal (list (testclass15-x inst) (setf (testclass15-y inst) 13))
+                '(12 13))))
+\f
 ;;;; success
 (sb-ext:quit :unix-status 104)