From 84c3f2480e5bb644f10616b4eb402adc4833c8c1 Mon Sep 17 00:00:00 2001 From: "Richard M. Stallman" Date: Fri, 12 Sep 2003 01:03:37 +0000 Subject: [PATCH] (Building Lists): Add copy-tree. --- lispref/lists.texi | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/lispref/lists.texi b/lispref/lists.texi index e68d1658a8b..b437916694f 100644 --- a/lispref/lists.texi +++ b/lispref/lists.texi @@ -733,6 +733,18 @@ The function @code{delq} offers a way to perform this operation destructively. See @ref{Sets And Lists}. @end defun +@defun copy-tree tree &optional vecp +This function returns a copy the tree @code{tree}. If @var{tree} is a +cons cell, this makes a new cons cell with the same @sc{car} and +@sc{cdr}, then recursively copies the @sc{car} and @sc{cdr} in the +same way. + +Normally, when @var{tree} is anything other than a cons cell, +@code{copy-tree} simply returns @var{tree}. However, if @var{vecp} is +non-@code{nil}, it copies vectors too (and operates recursively on +their elements). +@end defun + @defun number-sequence from to &optional separation This returns a list of numbers starting with @var{from} and incrementing by @var{separation} (or by 1 if @var{separation} -- 2.39.2