[R] [ESS] Indentation in R code

[Göran Broström]

On Mon, Sep 26, 2005 at 09:27:56AM +0200, Martin Maechler wrote:
> I'm crossposting to the ESS-help mailing list which is slightly
> more appropriate here.  [This may be a rare case where
> crossposting seems to make much sense.]
> 
> >>>>> "PD" == Peter Dalgaard <p.dalgaard at biostat.ku.dk>
> >>>>>     on 25 Sep 2005 19:40:45 +0200 writes:
> 
>     PD> Seth Falcon <sfalcon at fhcrc.org> writes:
> 
>     >> On 24 Sep 2005, goran.brostrom at gmail.com wrote:
>     >> 
>     >> > I am using emacs-21.3 when writing R functions on Linux debian, and
>     >> > I am trying to follow the advice i R-exts.pdf (2.1.1) regarding
>     >> > indentation. That is, I set 'c-default-style' to "bsd" and
>     >> > 'c-basic-offset' to 4. However, while this gives me the intended
>     >> > indentation in C code, it doesn't change the behavior in R code; I
>     >> > still get an indentation of size 2. This is my .emacs file after
>     >> > customization:
>     >> >
>     >> > (require 'ess-site)
>     >> > (custom-set-variables
>     >> >  ;; custom-set-variables was added by Custom -- don't edit or
>     >> >  ;; cut/paste it!  Your init file should contain only one such
>     >> >  ;; instance.
>     >> >  '(c-basic-offset 4)
>     >> >  '(c-default-style "bsd"))
>     >> >  (custom-set-faces
>     >> >  ;; custom-set-faces was added by Custom -- don't edit or cut/paste it!
>     >> >  ;; Your init file should contain only one such instance.
>     >> > )
>     >> 
>     >> Not sure if this is the best way, but I have the following after
>     >> loading ess-site:
>     >> 
>     >> (setq ess-indent-level 4)
> 
> 
> 
>     PD> I have (I believe it stems from Martin M. originally):
> 
> yes, most probably  {IIRC, Kurt Hornik was involved too}.
> 
>     PD>      (add-hook 'c-mode-hook '(lambda()
>     PD> 			       (c-set-style "stroustrup")))
> 
> the above is not quite what I have or did recommend, 
> which is rather  "bsd" + "offset 4"  as Göran has above
> 
> In fact, Göran mentions the "R-exts" manual and that has
> the following  *before* giving the emacs-lisp statements:
> 
> >> (For GNU Emacs 20: for GNU Emacs 21 use
> >> customization to set the `c-default-style' to `"bsd"' and
> >> `c-basic-offset' to `4'.)
> 
> and indeed, that's what Göran did and you should do with a
> current emacs, either customize via GUI or,
> in your ~/.emacs file, find the section '(custom-set-variables ...)' and add 
>  '(c-basic-offset 4)
>  '(c-default-style "bsd")
> 
> to the lines already there, or if there's no such section, add
> 
> (custom-set-variables
>   ;; custom-set-variables was added by Custom -- don't edit or cut/paste it!
>   ;; Your init file should contain only one such instance.
>  '(c-basic-offset 4)
>  '(c-default-style "bsd")
> )
> to the end of your ~/.emacs file
[...]

but this is not sufficient to get correct (4) indentation (ess) in R 
functions. We need some reference to ess as well, right? Maybe another
reference to the ESS manual is in order in 'R-exts'?

Thanks for all the help. I got it working now.

Göran