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(remove-hook): Doc string added.

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Change a single function into a list.
This commit is contained in:
Richard M. Stallman 1993-08-02 07:23:24 +00:00
parent 322959764a
commit 23f87cce43
1 changed files with 9 additions and 1 deletions
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10
lisp/emacs-lisp/lucid.el
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@ -53,8 +53,16 @@
(setcdr tail new-parent)))) (setcdr tail new-parent))))
(defun remove-hook (hook-var function) (defun remove-hook (hook-var function)
"Remove a function from a hook, if it is present.
First argument HOOK-VAR (a symbol) is the name of a hook, second
argument FUNCTION is the function to remove (compared with `eq')."
(if (boundp 'hook-var) (if (boundp 'hook-var)
(set hook-var (delq function (symbol-value hook-var))))) (let ((old (symbol-value hook-var)))
;; If the hook value is a single function, turn it into a list.
(if (or (not (listp old)) (eq (car old) 'lambda))
(set hook-var (list old)))
;; Now delete FUNCTION.
(set hook-var (delq function (symbol-value hook-var))))))
(defun remprop (symbol prop) (defun remprop (symbol prop)
(let ((plist (symbol-plist symbol))) (let ((plist (symbol-plist symbol)))