diff options
Diffstat (limited to 'lisp/emacs-lisp/assoc.el')
| -rw-r--r-- | lisp/emacs-lisp/assoc.el | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/lisp/emacs-lisp/assoc.el b/lisp/emacs-lisp/assoc.el index 31be851f2dd..264374ed721 100644 --- a/lisp/emacs-lisp/assoc.el +++ b/lisp/emacs-lisp/assoc.el @@ -1,6 +1,6 @@ ;;; assoc.el --- insert/delete functions on association lists -;; Copyright (C) 1996, 2001-2011 Free Software Foundation, Inc. +;; Copyright (C) 1996, 2001-2012 Free Software Foundation, Inc. ;; Author: Barry A. Warsaw <bwarsaw@cen.com> ;; Keywords: extensions @@ -61,10 +61,9 @@ pair is not at the head of alist. ALIST is not altered." (defun aput (alist-symbol key &optional value) - "Inserts a key-value pair into an alist. + "Insert a key-value pair into an alist. The alist is referenced by ALIST-SYMBOL. The key-value pair is made -from KEY and optionally, VALUE. Returns the altered alist or nil if -ALIST is nil. +from KEY and optionally, VALUE. Returns the altered alist. If the key-value pair referenced by KEY can be found in the alist, and VALUE is supplied non-nil, then the value of KEY will be set to VALUE. @@ -78,7 +77,7 @@ of the alist (with value nil if VALUE is nil or not supplied)." (setq alist (symbol-value alist-symbol)) (cond ((null alist) (set alist-symbol elem)) ((anot-head-p alist key) (set alist-symbol (nconc elem alist))) - (value (setcar alist (car elem))) + (value (setcar alist (car elem)) alist) (t alist)))) |