R devel - Mar 2007 - accessing "hidden" functions

Hi,

(I tried looking for it, but I don't think it was discussed before...  
or maybe I didn't use the correct keywords).

I have a package (say, pkg1), which uses NAMESPACE. This package  
contains a bunch of functions the are used internally, therefore  
they're not exported (say, internalFunc1).

Even though internalFunc1 is not exported, I can access it externally  
using pkg1:::internalFunc1 (yes, I do understand this is not supposed  
to be done).

Okay... now I have a second internal function, which starts with a  
dot (eg, ".internalFunc2").

Is there a way of accessing it without exporting it (or exposing it  
by removing the "dot")? ie, something like pkg1:::.internalFunc2 ?

thanks a lot,

beniton

On Wed, 28 Mar 2007, Benilton Carvalho wrote:
> Hi,
>
> (I tried looking for it, but I don't think it was discussed before...
> or maybe I didn't use the correct keywords).
>
> I have a package (say, pkg1), which uses NAMESPACE. This package
> contains a bunch of functions the are used internally, therefore
> they're not exported (say, internalFunc1).
>
> Even though internalFunc1 is not exported, I can access it externally
> using pkg1:::internalFunc1 (yes, I do understand this is not supposed
> to be done).
>
> Okay... now I have a second internal function, which starts with a
> dot (eg, ".internalFunc2").
>
> Is there a way of accessing it without exporting it (or exposing it
> by removing the "dot")? ie, something like pkg1:::.internalFunc2
?
Yes.  Starting a name with a dot is merely a convention, and almost 
everything (including the ::: operator) treats all names the same.

You will see lots of examples in the tools package used by R CMD check.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
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