[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
bug#15658: 24.1; (wishlist) Easy way to make a file-local variable also
From: |
yary |
Subject: |
bug#15658: 24.1; (wishlist) Easy way to make a file-local variable also permanent-local |
Date: |
Sat, 19 Oct 2013 18:15:04 -0400 |
There are occasional needs to preserve buffer-local variables across
major-mode changes. In the specific case of directory-local variables,
an automated solution looks to be feasible, see "bug#15577: 24.3;
dir-local variables not applied when switching major-mode"
File-local variables on the other hand are not as easy to categorize as
to their intent- for a particular mode, vs the file contents in general.
I propose adding `permanent' as another special "variable name" (along
the lines of `mode', `eval', `coding', and `unibyte') to let people
mark the file variables they want to remain between mode changes. For
example:
; mode: Lisp
; fill-column: 75
; comment-column: 50
; permanent: fill-column tab-width
would set & keep fill-column at 75 between mode changes, and would
preserve between major-mode switches any changes to tab-width.
(There is one edge case with this proposal: what would `permanent: eval'
do? Re-evaluate all `eval' file variables after a mode change? And
`permanent: mode' would have to be ignored or give a warning.)
In GNU Emacs 24.1.1 (i386-mingw-nt5.1.2600)
of 2012-06-10 on MARVIN
Windowing system distributor `Microsoft Corp.', version 5.1.2600
Configured using:
`configure --with-gcc (4.6) --cflags
-ID:/devel/emacs/libs/libXpm-3.5.8/include
-ID:/devel/emacs/libs/libXpm-3.5.8/src
-ID:/devel/emacs/libs/libpng-dev_1.4.3-1/include
-ID:/devel/emacs/libs/zlib-dev_1.2.5-2/include
-ID:/devel/emacs/libs/giflib-4.1.4-1/include
-ID:/devel/emacs/libs/jpeg-6b-4/include
-ID:/devel/emacs/libs/tiff-3.8.2-1/include
-ID:/devel/emacs/libs/gnutls-3.0.9/include'
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: ENU
value of $XMODIFIERS: nil
locale-coding-system: cp1252
default enable-multibyte-characters: t
Major mode: Lisp Interaction
Minor modes in effect:
tooltip-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
line-number-mode: t
transient-mark-mode: t
[Prev in Thread] |
Current Thread |
[Next in Thread] |
- bug#15658: 24.1; (wishlist) Easy way to make a file-local variable also permanent-local,
yary <=