X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Ftarget-sxhash.lisp;h=5fb976226b61a9144c08d80930b759adad32b472;hb=073501ed49414d9638cb41c05fb80627529f796d;hp=c77b2579c3ba2336b1d74c7b2adc53ae953fb632;hpb=17d48b6525fdd5f188961c863e1d1f1d44d29107;p=sbcl.git

diff --git a/src/code/target-sxhash.lisp b/src/code/target-sxhash.lisp
index c77b257..5fb9762 100644
--- a/src/code/target-sxhash.lisp
+++ b/src/code/target-sxhash.lisp
@@ -99,7 +99,7 @@
 ;;;	     (unless (string= (gethash hash ht) string)
 ;;;	       (format t "collision: ~S ~S~%" string (gethash hash ht)))
 ;;;	     (setf (gethash hash ht) string))))
-;;;     (format t "final count=~D~%" (hash-table-count ht)))
+;;;     (format t "final count=~W~%" (hash-table-count ht)))
 
 (defun %sxhash-simple-string (x)
   (declare (optimize speed))
@@ -145,6 +145,13 @@
 		    (logxor 422371266
 			    (sxhash ; through DEFTRANSFORM
 			     (class-name (layout-class (%instance-layout x)))))
+		    ;; Nice though it might be to return a nontrivial
+		    ;; hash value for other instances (especially
+		    ;; STANDARD-OBJECTs) there seems to be no good way
+		    ;; to do so. We can't even do the CLASS-NAME trick
+		    ;; (as used above for STRUCTURE-OBJECT) because
+		    ;; then CHANGE-CLASS would cause SXHASH values to
+		    ;; change, ouch! -- WHN recording wisdom of CSR
 		    309518995))
 	       (symbol (sxhash x)) ; through DEFTRANSFORM
 	       (array