anchor.diff:  ;; License along with this library; if not, write to the Free Software
   ;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   
  -;; $Id: gutils.lisp,v 1.6 2001-05-11 15:57:13 espen Exp $
  +;; $Id: gutils.lisp,v 1.7 2001-05-20 23:10:36 espen Exp $
   
   
   (in-package "KERNEL")
  
positive.code:      'string
       (first strings)
       (if delimiter (string delimiter) "")
       (concatenate-strings (rest strings)))))
  
  (defun string-prefix-p (string1 string2)
    (string= string1 string2 :end2 (length string1)))
  
negative.code: ;;;; Make PCL's class finalization protocol behave as specified in AMOP
  
  (defmethod finalize-inheritance ((class std-class))
    (dolist (super (class-direct-superclasses class))
      (unless (class-finalized-p super) (finalize-inheritance super)))
    (update-cpl class (compute-class-precedence-list class))
    (update-slots class (compute-slots class))
    (update-gfs-of-class class)
    (update-inits class (compute-default-initargs class))
    (update-make-instance-function-table class))
  
  (defmethod finalize-inheritance ((class forward-referenced-class))
    (error "~A can't be finalized" class))
  
  (defun update-class (class &optional finalizep)  
    (declare (ignore finalizep))
    (when (and
  	 (class-finalized-p class)
  	 (not (class-has-a-forward-referenced-superclass-p class)))
      (finalize-inheritance class)
      (dolist (sub (class-direct-subclasses class))
        (update-class sub))))
  
  (defmethod add-method :before ((gf standard-generic-function)
  			       (method standard-method))
    (declare (ignore gf))
    (dolist (specializer (method-specializers method))
      (when (and
  	   (typep specializer 'standard-class)
  	   (not (class-finalized-p specializer))
  	   (not (class-has-a-forward-referenced-superclass-p specializer)))
        (finalize-inheritance specializer))))
  
  
  (in-package "GLIB")
  