X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fpcl%2Fwrapper.lisp;h=eb567cd36ba5854f73daedceb8faffb901b1ba73;hb=6bbc22725d3bf663726ed9adca544e39316364a6;hp=1e8b2f83b9d67f54c2256e7fd67ac8ac482b1dd8;hpb=f73aadf04d841e0f1bfede4c11a13c4ba5c4e264;p=sbcl.git

diff --git a/src/pcl/wrapper.lisp b/src/pcl/wrapper.lisp
index 1e8b2f8..eb567cd 100644
--- a/src/pcl/wrapper.lisp
+++ b/src/pcl/wrapper.lisp
@@ -152,6 +152,9 @@
     (remhash owrapper *previous-nwrappers*)
     (setf (gethash nwrapper *previous-nwrappers*) new-previous)))
 
+;;; FIXME: This is not a good name: part of the constract here is that
+;;; we return the valid wrapper, which is not obvious from the name
+;;; (or the names of our callees.)
 (defun check-wrapper-validity (instance)
   (let* ((owrapper (wrapper-of instance))
          (state (layout-invalid owrapper)))
@@ -187,6 +190,12 @@
 (defun check-obsolete-instance (instance)
   (when (invalid-wrapper-p (layout-of instance))
     (check-wrapper-validity instance)))
+
+(defun valid-wrapper-of (instance)
+  (let ((wrapper (wrapper-of instance)))
+    (if (invalid-wrapper-p wrapper)
+        (check-wrapper-validity instance)
+        wrapper)))
 
 ;;;  NIL: means nothing so far, no actual arg info has NILs in the
 ;;;  metatype.