Function: custom-variable-p

custom-variable-p is a byte-compiled function defined in custom.el.gz.

Signature

(custom-variable-p VARIABLE)

Documentation

Return non-nil if VARIABLE is a customizable variable.

A customizable variable is either (i) a variable whose property list contains a non-nil standard-value or custom-autoload property, or (ii) an alias for another customizable variable.

Probably introduced at or before Emacs version 24.3.

Aliases

user-variable-p (obsolete since 24.3)

Source Code

;; Defined in /usr/src/emacs/lisp/custom.el.gz
(defun custom-variable-p (variable)
  "Return non-nil if VARIABLE is a customizable variable.
A customizable variable is either (i) a variable whose property
list contains a non-nil `standard-value' or `custom-autoload'
property, or (ii) an alias for another customizable variable."
  (when (symbolp variable)
    (setq variable (indirect-variable variable))
    (or (get variable 'standard-value)
	(get variable 'custom-autoload))))