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ANSI Common Lisp 14 Conses 14.2 Dictionary of Conses
14.2.37 copy-alist |
Function |
- Syntax:
-
copy-alist
alist
new-alist
- Arguments and Values:
-
alist - an association list.
new-alist - an association list.
- Description:
-
copy-alist returns a copy of alist.
The list structure of alist is copied,
and the elements of alist which are conses are
also copied (as conses only).
Any other objects which are referred to,
whether directly or indirectly,
by the alist continue to be shared.
- Examples:
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(defparameter *alist* (acons 1 "one" (acons 2 "two" '())))
*alist* ((1 . "one") (2 . "two"))
(defparameter *list-copy* (copy-list *alist*))
*list-copy* ((1 . "one") (2 . "two"))
(defparameter *alist-copy* (copy-alist *alist*))
*alist-copy* ((1 . "one") (2 . "two"))
(setf (cdr (assoc 2 *alist-copy*)) "deux") "deux"
*alist-copy* ((1 . "one") (2 . "deux"))
*alist* ((1 . "one") (2 . "two"))
(setf (cdr (assoc 1 *list-copy*)) "uno") "uno"
*list-copy* ((1 . "uno") (2 . "two"))
*alist* ((1 . "uno") (2 . "two"))
- See Also:
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copy-list
- Allegro CL Implementation Details:
-
None.
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