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:             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
  
negative.code: ; tré – Copyright (c) 2005–2009,2011–2014 Sven Michael Klose <pixel@hugbox.org>
  
  (defun %struct-option-keyword? (x)
    (eq x :constructor))
  