; Improve docstring of cl-check-type

* lisp/emacs-lisp/cl-macs.el (cl-check-type): Improve docstring.

(cherry picked from commit 38cc36a375344d2518eb8f9d3e0e6943199da529)

diff --git a/lisp/emacs-lisp/cl-macs.el b/lisp/emacs-lisp/cl-macs.el
index 84896239ba3c0d791c966de3b16ef40b673d7f47..c171c389aae8f34787923022b2432359c381298e 100644 (file)
--- a/lisp/emacs-lisp/cl-macs.el
+++ b/lisp/emacs-lisp/cl-macs.el
@@ -3526,7 +3526,10 @@ Of course, we really can't know that for sure, so it's just a heuristic."
 ;;;###autoload
 (defmacro cl-check-type (form type &optional string)
   "Verify that FORM is of type TYPE; signal an error if not.
-STRING is an optional description of the desired type."
+STRING is an optional description of the desired type.
+
+Hint: To check the type of an object, use `cl-type-of'.
+To define new types, see `cl-deftype'."
   (declare (debug (place cl-type-spec &optional stringp)))
   (and (or (not (macroexp-compiling-p))
           (< cl--optimize-speed 3) (= cl--optimize-safety 3))