Tom wrote:

> > I don't know how to read these graphs.  Also, it's Debian only, suppose
> > the picture is very different for mac or MS-Windows users?
> >
> R is at position 33 in the tiobe index:
> http://www.tiobe.com/content/paperinfo/tpci/index.html
> 
> rexx isn't listed at all. I doubt it has much of a following anymore.

OK, I'm convinced.  I'll make the default R.  I'll add a note in the
docs for Rexx users how they can change the default.

> > We could add a g:filetype_r variable to allow users to change the
> > fallback:
> >
> >   " Nothing recognized, use user default or assume Rexx
> >   if exists("g:filetype_r")
> >     exe "setf " . g:filetype_r
> >   else
> >     setf rexx
> >   endif
> >
> Would this special solution that works only for this extension
> 
>     let g:filetype_r = "r"
> 
> really be an advantage over that
> 
>     au filetypedetect BufRead,BufNewFile *.R     setf r

That the automatic detection still works.

> New users would have to edit personal configuration files one way or the 
> other.

Yep. 

> I could imagine some use of turning this into a general solution that's 
> valid for all extensions though -- and thus replacing the filetypedetect 
> autocommand group.

For most people setting a variable is a lot simpler than this
autocommand stuff.

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