anchor.diff:  
   (defun %struct-sort-fields (fields-and-options)
     (with-queue (fields options)
  -    (map [? (& (cons? _) (%struct-option-keyword? _.))
  +    (map [? (& (cons? _)
  +               (%struct-option-keyword? _.))
   	        (enqueue options _)
   	        (enqueue fields _)]
   	     fields-and-options)
  -    (values (queue-list fields) (queue-list options))))
  +    (values (queue-list fields)
  +            (queue-list options))))
   
   (defvar *struct-defs*)
   
  
positive.code:   (carlist (%struct-def name)))
  
  (defun %defstruct-expander (name &rest fields-and-options)
    (multiple-value-bind (flds opts) (%struct-sort-fields fields-and-options)
      (%struct-add-def name flds)
      `(progn
         (declare-cps-exception ,name)
         ,(%struct-make name flds opts)
         ,(%struct? name)
         ,@(%struct-getters name flds)
         (defmacro ,($ "WITH-" name) (s &body body)
  		 `(with-struct ,name ,,s
              ,,@body))
  
negative.code:             fields)))
  
  (defun %struct-make (name fields options)
    (with (sym        (%struct-make-symbol name options)
  		 g          (gensym)
           user-init  (%struct-make-init fields g)
  	     type-init  `((= (aref ,g 0) 'struct
                           (aref ,g 1) ',name)))
      `(defun ,sym ,(%struct-make-args fields)
         (let ,g (make-array ,(+ 2 (length fields)))
           ,@(? user-init
  