Martin Maechler <maechler <at> stat.math.ethz.ch> writes:
>
> >>>>> "BB" == Ben Bolker <bolker <at> ufl.edu>
> >>>>> on Sun, 23 Dec 2007 15:31:23 -0800 (PST) writes:
>
> BB> Bjørn-Helge Mevik wrote:
> >>
> >> Ben Bolker wrote:
> >>
> >>> http://cran.r-project.org/doc/manuals/R-ints.html#R-coding-standards
> >>>
> >>> gives detailed advice on how to set the indentation level for
> >>> C code to 4, but it took me a bit of poking around in the archives
> >>> to find the
> >>>
> >>> (setq ess-indent-level 4)
> >>>
> >>> incantation for getting the R indentation right as well.
> >>
> >> I'm confused. Doesn't the suggested code
> >>
> >> (add-hook 'ess-mode-hook
> >> (lambda ()
> >> (ess-set-style 'C++)
> >> ...
> >>
> >> implicitly set ess-indent-level to 4? At least for me, using the
> >> suggested code gives indentation steps of 4 in R code.
> >>
> >> --
> >> Bjørn-Helge Mevik
> >>
> >> ____
> >>
>
> BB> I guess, but since I was using emacs 21 I followed the
> BB> instructions to use customization instead -- and I guess
> BB> the customization steps don't include this hook ?
>
> I'm confused, too, Ben.
>
> Why exactly are you not willing to use the above (add-hook ...) ?
>
> Is this an "unfortunate" wording of the "Writing R Ext.." manual?
>
> Regards,
> Martin
The current paragraph says:
It is also important that code is written in a way that allows others to
understand it. This
is particularly helpful for fixing problems, and includes using self-descriptive
variable names,
commenting the code, and also formatting it properly. The R Core Team recommends
to use a
basic indentation of 4 for R and C (and most likely also Perl) code, and 2 for
documentation in
Rd format. Emacs users can implement this indentation style by putting the
following in one
of their startup files. (For GNU Emacs 20: for GNU Emacs 21 or later use
customization to set
the c-default-style to "bsd" and c-basic-offset to 4.)
[followed by emacs code, including the ESS stuff]
I read the paragraph above and assumed that I could (and
should) use the customization hooks in Emacs 21 rather than
putting the code in my .emacs file by hand. In fact, I'm
a little confused; the customization recommended appears to
have set the following ...
(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 (quote ((c-mode . "bsd") (java-mode . "java") (other .
"gnu")))))
which takes care of the C mode stuff but doesn't do anything
for ESS or Perl?
Perhaps change the last sentence to
(In GNU Emacs 21 or later one can instead use customization to set
the c-default-style to "bsd" and c-basic-offset to 4, although
the ESS and Perl styles still need to be set manually.)
?
Ben
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