`(logior (logand ,v ,mask)
(logand ,getter (lognot ,mask))))))))))
+;;; References
+
+;;;###autoload
+(defmacro gv-ref (place)
+ "Return a reference to PLACE.
+This is like the `&' operator of the C language."
+ (gv-letplace (getter setter) place
+ `(cons (lambda () ,getter)
+ (lambda (gv--val) ,(funcall setter 'gv--val)))))
+
+(defsubst gv-deref (ref)
+ "Dereference REF, returning the referenced value.
+This is like the `*' operator of the C language.
+REF must have been previously obtained with `gv-ref'."
+ (funcall (car ref)))
+;; Don't use `declare' because it seems to introduce circularity problems:
+;; Warning: Eager macro-expansion skipped due to cycle:
+;; … => (load "gv.el") => (macroexpand-all (defsubst gv-deref …)) => (macroexpand (defun …)) => (load "gv.el")
+(gv-define-setter gv-deref (v ref) `(funcall (cdr ,ref) ,v))
+
;;; Vaguely related definitions that should be moved elsewhere.
;; (defun alist-get (key alist)