;;; widget.el --- a library of user interface components
;;
-;; Copyright (C) 1996, 1997, 2001, 2002, 2003, 2004,
-;; 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
+;; Copyright (C) 1996-1997, 2001-2016 Free Software Foundation, Inc.
;;
;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
;; Keywords: help, extensions, faces, hypermedia
-;; Version: 1.9920
;; X-URL: http://www.dina.kvl.dk/~abraham/custom/
;; Package: emacs
;; Doing this is unnecessary in Emacs 20. Kept as dummy in case
;; external libraries call it. We save a kb or two of purespace by
;; dummying-out such definitions generally.
-(defmacro define-widget-keywords (&rest keys)
+(defmacro define-widget-keywords (&rest _keys)
;; ;; Don't use backquote, since that makes trouble trying to
;; ;; re-bootstrap from just the .el files.
;; (list 'eval-and-compile
* (widget-create NAME)
-* (apply 'widget-create CLASS ARGS)
+* (apply \\='widget-create CLASS ARGS)
The third argument DOC is a documentation string for the widget."
+ ;;
+ (unless (or (null doc) (stringp doc))
+ (error "widget documentation must be nil or a string."))
(put name 'widget-type (cons class args))
(put name 'widget-documentation (purecopy doc))
name)