Using the TAGS facility in Emacs for R/S functions

[Jeff Mincy]

On Sun, 27 Jan 2002, rmh at surfer.sbm.temple.edu wrote:

> is your proposal intended to replace Lubinksy-S-tags or to modify
> it?
> 
> Rich


The Lubinsky-S-tags should be removed and users should be pointed to
either ctags or some other tags program.  ctags is better than other
tags programs (including the one that comes with emacs/xemacs).  But,
tags can be generated with any tags program that supports --regex.
The regex for ctags is shown below.  Here is copy of email that I sent
before...

Note, ctags can only support splus definitions that are on a single
line.  It can not currently handle multiple line definitions like

foofoo <-
## The foofoo function ...
function ( ... )

-jeff


>From jeff Thu Jul 19 22:27:59 2001
Date: Thu, 19 Jul 01 22:27:59 EDT
From: Jeff Mincy <jeff at delphioutpost.com>
To: ess-bugs at stat.math.ethz.ch
Subject: ess-mode 5.1.18; tags


   
I noticed that some attempt at doing tags is included in ess
under ess-5.1.18/etc/other/Tags/Lubinsky-S-tags


The ctags/etags at:

     The official Exuberant Ctags web site at:
          http://ctags.sourceforge.net


can be coaxed into doing tags:


/etc/ctags.conf
================
--verbose=yes
--totals=yes
--recurse
--langmap=asm:
--langdef=Splus
--langmap=Splus:.s.S.R.r.q
--regex-Splus=/^[ \t]*([^ \t<]+)[ \t]*<-[ \t\n\r]*function/\1/
================

bash% etags 
RECURSING into directory "."
OPENING base.s as S language file
...


When using xemacs, you would need to add the appropriate tag file to
tag-table-alist.

  (setq-default tag-table-alist
        (delete-if-not
         #'(lambda (x) (and (cdr x) (file-exists-p (cdr x))))
         `(("\\.e\\(l\\|macs\\)\\'" . ,(concat "XEMACS-" emacs-program-version "_TAGS"))
           ("\\.[RSs]\\'" . "S_TAGS"))))

-jeff


>From jeff Fri Jul 20 09:56:44 2001
From: Jeff Mincy <jeff at delphioutpost.com>
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Date: Fri, 20 Jul 2001 09:56:44 -0400
To: rossini at u.washington.edu
Subject: Re: ess-mode 5.1.18; tags
In-Reply-To: <87lmlkz0tv.fsf at jeeves.blindglobe.net>
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   From: rossini at blindglobe.net (A.J. Rossini)
   Date: 19 Jul 2001 21:22:36 -0700
   
   >>>>> "JM" == Jeff Mincy <jeff at delphioutpost.com> writes:
   
       JM>    From: rossini at blindglobe.net (A.J. Rossini) Date: 19 Jul
       JM> 2001 20:32:21 -0700
      
       JM>    Thanks, Jeff, for the suggestions.  We'll try to implement
       JM> (we are supposed to be heading towards a stable 5.2 release,
       JM> but...).
      
       JM> The tags suggestion was more of a documentation thing.  (I
       JM> didn't make that particularly clear)
   
   Well, we also can run it as part of a "regenerate tags" style script,
   or at least include a script that people can use.
   
Yep.  You could also put a link to the tags sourceforge web site so
people can download etags.

--

Note: The tags suggestion was more of a documentation thing.
(I didn't make that particularly clear)
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