From: MON KEY <monkey@sandpframing.com>
To: 7088@debbugs.gnu.org
Cc: 7083@debbugs.gnu.org, Andreas Schwab <schwab@linux-m68k.org>
Subject: bug#7088: `copy-tree' of a vector copy sharing structure.with original
Date: Thu, 23 Sep 2010 01:28:33 -0400 [thread overview]
Message-ID: <AANLkTikYxb5Nk_08z_qN4faUeFPoOkz18cN04A2U5AHW@mail.gmail.com> (raw)
When copy-tree copies vectors the copy shares structure with the original.
This is unlike the behavior of copy-tree on a list of lists:
(let ((orig '((a b) (c d) (e f) (g h)))
new-cp)
(setq new-cp (copy-tree orig))
(equal (elt
(prog1 orig
(setf (car new-cp) "bubba")) 0)
'(a b)))
;=> t
(let ((orig [[a b] [c d] [e f] [g h]])
new-cp)
(setq new-cp (copy-tree orig))
(string-equal (aref (prog1 orig
(aset new-cp 0 "bubba"))
0)
"bubba"))
;=> t
Shouldn't idx 0 of the orig tree still be [a b]?
Note This bug _should_ prob. have stayed with Bug7083 but that bug
report was prematurely closed.
--
/s_P\
next reply other threads:[~2010-09-23 5:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-23 5:28 MON KEY [this message]
2010-09-23 8:47 ` bug#7083: bug#7088: `copy-tree' of a vector copy sharing structure.with original Andreas Schwab
2010-09-23 20:41 ` David De La Harpe Golden
2010-09-24 5:19 ` MON KEY
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