CLHS: Function COPY-LIST

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Function COPY-LIST

Syntax:

copy-list list => copy

Arguments and Values:

list---a proper list or a dotted list.

copy---a list.

Description:

Returns a copy of list. If list is a dotted list, the resulting list will also be a dotted list.

Only the list structure of list is copied; the elements of the resulting list are the same as the corresponding elements of the given list.

Examples:

     (setq lst (list 1 (list 2 3))) =>  (1 (2 3))
     (setq slst lst) =>  (1 (2 3))
     (setq clst (copy-list lst)) =>  (1 (2 3))
     (eq slst lst) =>  true
     (eq clst lst) =>  false
     (equal clst lst) =>  true
     (rplaca lst "one") =>  ("one" (2 3))
     slst =>  ("one" (2 3))
     clst =>  (1 (2 3))
     (setf (caadr lst) "two") =>  "two"
     lst =>  ("one" ("two" 3))
     slst =>  ("one" ("two" 3))
     clst =>  (1 ("two" 3))

Side Effects: None.

Affected By: None.

Exceptional Situations:

The consequences are undefined if list is a circular list.

See Also:

copy-alist, copy-seq, copy-tree

Notes:

The copy created is equal to list, but not eq.

Copyright 1996-2001, Xanalys Inc. All rights reserved.