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ANSI Common Lisp  14 Conses 14.2 Dictionary of Conses
| 14.2.14 copy-list |
Function |
- 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))
- 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.
- Allegro CL Implementation Details:
-
None.
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