Delete accessor slot properties after they are used. This prevents

them from holding on to the generic procedures, and from defining
identical methods for each subclass.

diff --git a/v7/src/sos/slot.scm b/v7/src/sos/slot.scm
index 9662a64b6be0534056c02b2e47a19f05effa58d3..abe00ba70d30a2c73b0931c40081212ca61fd49e 100644 (file)
--- a/v7/src/sos/slot.scm
+++ b/v7/src/sos/slot.scm
@@ -1,6 +1,6 @@
 ;;; -*-Scheme-*-
 ;;;
-;;; $Id: slot.scm,v 1.5 1997/06/25 03:28:58 cph Exp $
+;;; $Id: slot.scm,v 1.6 1997/06/25 05:31:31 cph Exp $
 ;;;
 ;;; Copyright (c) 1995-97 Massachusetts Institute of Technology
 ;;;
@@ -41,7 +41,7 @@
   (name #f read-only #t)
   (class #f read-only #t)
   (index #f read-only #t)
-  (properties #f read-only #t))
+  (properties #f))
 
 (define (slot-name slot)
   (guarantee-slot-descriptor slot 'SLOT-NAME)
@@ -129,7 +129,12 @@
             (lambda (keyword maker)
               (let ((accessor (slot-property slot keyword #f)))
                 (if accessor
-                    (add-method accessor (maker class name)))))))
+                    (begin
+                      (add-method accessor (maker class name))
+                      (set-slot-descriptor/properties!
+                       slot
+                       (del-assq! keyword
+                                  (slot-descriptor/properties slot)))))))))
        (install 'ACCESSOR slot-accessor-method)
        (install 'MODIFIER slot-modifier-method)
        (install 'INITPRED slot-initpred-method)))