Re: setting emacs variables

[Daniel Wetterbro]

      Gerald,

   The reason c-basic-offset isn't set to 4 is because Emacs resets all "c-related 
 variables" when entering cc-mode. Therefor you have to set up your own c-style, 
 which is a list of predefined values for all "c-related variables" and then
 make sure your c-style is automatically loaded while entering cc-mode.
   I don't know under which platform you're running emacs, but if you have
 access to the info documentation under Linux (or another Unix) do as follows:
   (If you're not familiar with info I suggest you type: info info <ret>
 and read that doc first, then do as described below)

   1. info emacs <ret> (start info and go to the Emacs section)
   2. m Programs <ret> (go to the "Programs" menu)
   3. m Program Indent

   Here you can find just what you need to customize the emacs indentation
 behaviour. (Note the "Custom C Indent" menu)
   You might also find this information helpful (it also gives you a sample
 for setting up your own c-style):

   1. info emacs <ret>
   2. m Customization <ret>
   3. m Variables <ret> (if you go to "Init File" here instead you'll
 learn the basics of writing an .emacs file)

  Here's a part of my own .emacs file (mostly the same as the one in the
info  doc):

  (setq my-c-style '((c-basic-offset . 4)
                     (c-cleanup-list . (scope-operator
                                        empty-defun-braces
                                        defun-close-semi))
                     (c-offsets-alist . ((arglist-close . c-lineup-arglist)
                                         (substatement-open . 0)))))
   
  (add-hook 'c-mode-common-hook
            (function (lambda ()
                        (c-add-style "my-style" my-c-style t)))) 

  The first big block is setting up a new c-style called "my-c-style" and 
the second is making
  "my-c-style" being used when entering cc-mode.

  Gerald A Winters wrote:
> Olivier,
>
> Thanks for the reply.  Your code below showed me
> how to customize the indentation along with
> the help facility.
>
> However, according to the emacs help this should work:
>
> (setq c-basic-offset 4)
>
> but it doesn't -- it has absolutely no effect that I can tell.
> If you understand why the above statement won't work I'd
> like to know.  But regardless thanks for the help.
>
> --jerry
>
> > Gerald A Winters wrote:
> >
> >  > I am a C-programmer and am using v20.7.  I would like to
> >  > change the default indentation level from "2" to "4" when
> >  > in C-mode.  I have a couple manuals and both indicate to
> >  > change the emacs varibale "c-indent-level".  However, neither
> >  > of these works in my .emacs file:
> >  >
> >  > (setq c-indent-level 4)
> >  > (setq-default c-indent-level 4)
> >  >
> >  > I would be *very* grateful if someone can suggest a solution.
> >  > thanks.
> >  >
> >  > --jerry
> >  >
> >  >
> >  > _______________________________________________
> >  > Help-gnu-emacs mailing list
> >  > Help-gnu-emacs@gnu.org
> >  > http://mail.gnu.org/mailman/listinfo/help-gnu-emacs
> >  >
> >  >
> >
> > Emacs uses the cc-mode 
> >
> >
> > to fontify C files, and to indent too. Indentation
> > is based on the 'tab-width' variable, which can be redifined for each
> > mode. The C structure's indentation is related to
> > c-basic-offset variable and an offset for the different part of the 
> > structure. In order to have more
> > precise informations try M-x hell RET i RET C-s 'CC mode', section 
> > Customizing indentation and try this in your .emacs file :
> >
> >
> >     (setq tab-width 4)
> >     ;; this will make sure spaces are used instead of tabs
> >     (setq indent-tabs-mode nil)
> >     (setq c-tab-always-indent t)
> >
> >     ;; Highlight matching parantheses
> >     (show-paren-mode 1)
> >
> >     ;;--------------------------
> >     ;; indentation
> >     ;; For more information : M-x info cc-mode
> >     (setq c-comment-only-line-offset      0);; -1000 to have it at the
> > beginning of the line
> >     (setq c-basic-offset                  3);; general value for
> > indentation on wich every arg of the
> >     ;; c-se
> >
> >
> > t-offset will be based on
> >     ;; + mean c-basic-offset*1
> >     (c-set-offset   'arglist-close        0);; 0 mean c-basic-offset*0
> >     (c-set-offset   'arglist-intro       '+);; function parameters
> >     (c-set-offset   'substatement-open    0);; indentation of braces for
> > if, for, while
> >     (c-set-offset   'substatement        '+);; indentation of a statement
> > (each line of a function)
> >     (c-set-offset   'case-label          '+);; indentation for the label
> > in a switch-case structure
> >     (c-set-offset   'defun-block-intro   '+);; indentation of variable
> > def for a function (no tab)
> >
> >     (c-set-offset   'statement            0);; indentation of the
> > function's body (the first line
> >     ;; starts at this point)
> >     ;;--------------------------
> >
> > The wright way to do this is to mak a new hook for the c-mode. You can 
> > see the documentation about hooks : M_x help RET i -RET and look for 
> > hook description.
> > -- 
> > ----------------
> >
> >
> > -------------------------------------------------
> > Olivier PIERRAT                   Tel.   : +33 (0) 03 90 40 00 00
> > ALPLOG                            Port.  : +33 (0) 06 76 41 16 00
> > Immeuble le Platon                mailto : o.pierrat@alplog.fr
> > 67400 ILLKIRCH                    mailto : o.pierrat@free.fr
> >
> > -----------------------------------------------------------------
> >
> >
> >
> >
> > _______________________________________________
> > Help-gnu-emacs mailing list
> > Help-gnu-emacs@gnu.org
> > http://mail.gnu.org/mailman/listinfo/help-gnu-emacs
> >
> >     
>
>
> _______________________________________________
> Help-gnu-emacs mailing list
> Help-gnu-emacs@gnu.org
> http://mail.gnu.org/mailman/listinfo/help-gnu-emacs
>
>
>