diff options
author | Richard M. Stallman <rms@gnu.org> | 2003-09-12 01:03:37 +0000 |
---|---|---|
committer | Richard M. Stallman <rms@gnu.org> | 2003-09-12 01:03:37 +0000 |
commit | 84c3f2480e5bb644f10616b4eb402adc4833c8c1 (patch) | |
tree | c173f3431bb1f6fb63cc761435333c881e358208 /lispref/lists.texi | |
parent | f6cad0895d9e349c1edd3ed64544665879df84b3 (diff) |
(Building Lists): Add copy-tree.
Diffstat (limited to 'lispref/lists.texi')
-rw-r--r-- | lispref/lists.texi | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/lispref/lists.texi b/lispref/lists.texi index e68d1658a8..b437916694 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} |