(custom-autoload, custom-variable-p): New functions.

diff --git a/lisp/custom.el b/lisp/custom.el
index abf4c5356a5a4e09fa6bbeda2e53e2be7aceaac3..a4a496c0befb65e8633564c6e714a004d75cd03e 100644 (file)
--- a/lisp/custom.el
+++ b/lisp/custom.el
@@ -481,6 +481,17 @@ LOAD should be either a library file name, or a feature name."
     (unless (member load loads)
       (put symbol 'custom-loads (cons (purecopy load) loads)))))
 
+(defun custom-autoload (symbol load)
+  "Mark SYMBOL as autoloaded custom variable and add dependency LOAD."
+  (put symbol 'custom-autoload t)
+  (custom-add-load symbol load))
+
+;; This test is also in the C code of `user-variable-p'.
+(defun custom-variable-p (variable)
+  "Return non-nil if VARIABLE is a custom variable."
+  (or (get variable 'standard-value)
+      (get variable 'custom-autoload)))
+
 ;;; Loading files needed to customize a symbol.
 ;;; This is in custom.el because menu-bar.el needs it for toggle cmds.