Re: tabs with cperl-mode

Re: tabs with cperl-mode

[Ilya Zakharevich]

[A complimentary Cc of this posting was sent to
Martin Barth
<martin@senfdax.de>], who wrote in article <mailman.3836.1118229884.25862.help-gnu-emacs@gnu.org>:
> hi everyone,
> 
> I need to just use tabs for indentiation with emacs and cperl_mode to stick
> to our coding style guide.
> I've search quite a while but i didnt found anything that could help me.
> 
> in http://www.gnu.org/software/emacs/manual/emacs.html#Just%20Spaces is
> decribed to use only spaces - i need the conserve way.
> 
> any suggestions?

Stop asking Emacs to indent with spaces.  The default on Emacs is to
indent with tabs.  CPerl does not indent itself, it just calculates
the amount of indentation, and asks Emacs to make the indentation.

Hope this helps,
Ilya

Re: tabs with cperl-mode

[Martin Barth]

> Stop asking Emacs to indent with spaces.  
i never did that. ( well i think so )

> The default on Emacs is to indent with tabs.

even with no emacs config files there are spaces and tabs for indentation.
( if I indent for 8 "spaces" there is a \t instead of the spaces in the
files i saved.

maybe I'll try the save hock thing.. if i figure out how it works..

Thanks so far :)
Martin Barth

Re: tabs with cperl-mode

[Stefan Monnier]

> hi everyone, I need to just use tabs for indentiation with emacs and
> cperl_mode to stick to our coding style guide.  I've search quite a while
> but i didnt found anything that could help me.

> in http://www.gnu.org/software/emacs/manual/emacs.html#Just%20Spaces is
> decribed to use only spaces - i need the conserve way.

By default Emacs places TABs wherever it can when indenting lines.
So all you need to do is to make sure that it can always use TABs.
Since a TAB has a width corresponding to 8 characters, it means that you
should configure your major mode (in this case cperl-mode) to align
everything on multiples of 8.  I.e. start by setting cperl-indent-level
to 8.


        Stefan

Solved: Re: tabs with cperl-mode

[Martin Barth]

> align everything on multiples of 8.  I.e. start by setting
> cperl-indent-level to 8.

I changed that. It works :) And i was confused again, because i had 

(setq tab-width 4)

in my .emacs . So I googled a bit and I found the solution.
so this works fine for me:

(setq cperl-continued-statement-offset 4)
(setq cperl-indent-level 4)
(setq cperl-tab-always-indent t)
(setq default-tab-width 4)


thanks a lot for your help
Regards
Martin Barth

Re: Solved: Re: tabs with cperl-mode

[Stefan Monnier]

>> align everything on multiples of 8.  I.e. start by setting
>> cperl-indent-level to 8.

> I changed that. It works :) And i was confused again, because i had 

> (setq tab-width 4)

> in my .emacs . So I googled a bit and I found the solution.
> so this works fine for me:

> (setq cperl-continued-statement-offset 4)
> (setq cperl-indent-level 4)
> (setq cperl-tab-always-indent t)
> (setq default-tab-width 4)

Changing tab-width is asking for trouble.  Its normal meaning, agreed upon
by all programs is that the width of a TAB is 8, no more no less.  If you
change it, it'll mess something up at some point.

Changing default-tab-width is even worse.

At least do

   (add-hook 'cperl-mode-hook (lambda () (setq tab-width 4)))

so it's only fucked up in your cperl mode and not in the rest.


        Stefan