[ESS] Indentation level
maechler at stat.math.ethz.ch
Mon May 17 10:36:07 CEST 2010
>>>>> "SE" == Stephen Eglen <S.J.Eglen at damtp.cam.ac.uk>
>>>>> on Fri, 14 May 2010 12:05:24 +0100 writes:
>> Yes, the default is definitely 2 and has always been so.
>> As R-core, we've set "our default" to 4, and indeed I have been preferring
>> that myself;
>> but nonetheless, the ESS default has always been 2.
>> One way to set it to 4 and change other things as well, is using
>> what we have had in the "R Internals" (and previously "R Extensions") manual
>> for many years;
>> e.g. from the Swiss (CH) CRAN mirror:
>> (about one page down):
>> ;;; ESS
>> (add-hook 'ess-mode-hook
>> (lambda ()
>> (ess-set-style 'C++ 'quiet)
>> ;; Because
>> ;; DEF GNU BSD K&R C++
>> ;; ess-indent-level 2 2 8 5 4
>> ;; ess-continued-statement-offset 2 2 8 5 4
>> ;; ess-brace-offset 0 0 -8 -5 -4
>> ;; ess-arg-function-offset 2 4 0 0 0
>> ;; ess-expression-offset 4 2 8 5 4
>> ;; ess-else-offset 0 0 0 0 0
>> ;; ess-close-brace-offset 0 0 0 0
>> [.... other recommendatinos omitted here ...]
>> and as others have said repeatedly on this thread:
>> Yes, you should and I think *must* set this via adding to the ess-mode-hook
>> BTW: In the above Emacs code, most are comments showing you the diverse
>> style settings,
>> mentioning indeed that the default ("DEF") is at 2.
SE> (This is mostly relevant for ess-core...)
SE> To follow up on this thread, this question of setting ess-indent-level
SE> was asked last year:
SE> where I suggested the workaround of doing:
SE> (defun myindent-ess-hook ()
SE> (setq ess-indent-level 4))
SE> (add-hook 'ess-mode-hook 'myindent-ess-hook)
SE> which has been reported in this thread. I've now investigated further,
SE> and ess-indent-level is set by the function ess-set-style, which is
SE> called when a new R buffer is opened, via the call to ess-mode. So
SE> currently I think it makes no sense to have variables such as
SE> ess-indent-level customizable. This is my fault, as I think I
SE> customized them many years ago!
Yes,...I'm pretty sure you are right, both about the history,
and about the conclusion.
I would like "us" to change this before releasing ESS 5.9 if
I have no time for this, this week though.
SE> Instead, it would make sense to allow
SE> users to customize the default style, which is exactly what Tony
SE> suggested and I disagreed with many years ago. Here is the relevant
SE> output from vc-annotate on ess-custom.el:
SE> 1421 rossini ;;; **FIXME** The following NEEDS to be customized.
SE> 3090 maechler ;; SJE: I disagree; this variable should not be
SE> customized; individual vars,
SE> 3062 stephen ;; such as ess-indent-level are already customizable.
SE> 1286 ess (defvar ess-default-style-list
SE> This would then give us a chance to promote the R-coding standards that
SE> Martin cites above.
Hmm, I do use it, but actually I'm not strongly promoting
that R users should adhere to the coding standard that R core (only!)
has adopted for the "base R" code.
But of course, I'm not against it either!
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