[debbugs-tracker] bug#13122: closed (transpose-subr defeats save-excursion)

[GNU bug Tracking System]

Your message dated Fri, 21 Dec 2012 13:43:55 +0800
with message-id <address@hidden>
and subject line Re: bug#13122: save-excursion not saving point
has caused the debbugs.gnu.org bug report #13122,
regarding transpose-subr defeats save-excursion
to be marked as done.

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-- 
13122: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=13122
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> --- Begin Message ---
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>
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> Subject: 
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> save-excursion not saving point
>
>
>
>
> Date: 
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> Sat, 8 Dec 2012 11:50:13 +0530
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>
>
>
> Hi,
>
> I wrote the following version of transpose-chars which is supposed to
> always transform the last two chars without moving the point.
> (defun gosmacs-tranpose-chars (n)
>   (interactive "p")
>   (save-excursion
>
>     (forward-char (- n))
>     (transpose-chars 1)))
>
> The trouble is, even though I have used save-excursion, the point does
> move 2 characters backwards when n=1! For other values of n, this seems to be working fine.
>
> Regards,
> Jyothis V
>
> In GNU Emacs 24.2.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.6.2)
>  of 2012-11-18 on eric
> Windowing system distributor `The X.Org Foundation', version 11.0.11300000
> Configured using:
>
>  `configure '--prefix=/usr' '--sysconfdir=/etc' '--libexecdir=/usr/lib'
>  '--localstatedir=/var' '--with-x-toolkit=gtk3' '--with-xft'
>  'CFLAGS=-march=x86-64 -mtune=generic -O2 -pipe -fstack-protector
>
>  --param=ssp-buffer-size=4 -D_FORTIFY_SOURCE=2'
>  'LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro''
>
> Important settings:
>   value of $LC_ALL: nil
>   value of $LC_COLLATE: nil
>   value of $LC_CTYPE: nil
>
>   value of $LC_MESSAGES: nil
>   value of $LC_MONETARY: nil
>   value of $LC_NUMERIC: nil
>   value of $LC_TIME: nil
>   value of $LANG: en_US.UTF-8
>   value of $XMODIFIERS: nil
>   locale-coding-system: utf-8-unix
>
>   default enable-multibyte-characters: t
>
> Major mode: Lisp Interaction
>
> Minor modes in effect:
>   diff-auto-refine-mode: t
>   global-auto-complete-mode: t
>   auto-complete-mode: t
>   icomplete-mode: t
>
>   ido-everywhere: t
>   shell-dirtrack-mode: t
>   which-function-mode: t
>   cua-mode: t
>   display-time-mode: t
>   electric-pair-mode: t
>   show-paren-mode: t
>   tooltip-mode: t
>   mouse-wheel-mode: t
>   file-name-shadow-mode: t
>
>   global-font-lock-mode: t
>   font-lock-mode: t
>   auto-composition-mode: t
>   auto-encryption-mode: t
>   auto-compression-mode: t
>   line-number-mode: t
>   transient-mark-mode: t
>
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#13122: save-excursion not saving point
>
>
>
>
> Date: 
>
> Fri, 21 Dec 2012 13:43:55 +0800
>
>
>
>
> User-agent: 
>
> Gnus/5.13 (Gnus v5.13) Emacs/24.2.91 (gnu/linux)
>
>
>
>
> martin rudalics <address@hidden> writes:
>
> > This is a limitation (or bug) in the code of `transpose-subr' and
> > `transpose-subr-1' due to the use of `delete-and-extract-region' (IIRC
> > transposing mangles `undo' as well.)
>
> I've committed a fix to trunk.
>
>
> --- End Message ---