R devel - Jul 2010 - "Use of ‘.C’ for C++ is now deprecated and will be removed in R 2.12.0"

Hi,

I am writing a R package and having a bit of trouble to have the C++
code working.

I was planing using the .C interface function, however I found the
comment (Use of ?.C? for C++ is now deprecated and will be removed in
R 2.12.0.) in the R-exts manual.

So this interface function should not be used anymore - .Call() or
Rcpp instead? What is the reason for the deprecation?

Thanks,
Florian

Please don't pick things out of context.  It does not say .C() is 
deprecated and it is not talking about R code: it says

There are default variables and rules for this (determined when R is 
configured and recorded in R_HOME/etcR_ARCH/Makeconf), providing 
support for C, C++, FORTRAN 77, Fortran 9x, Objective C and Objective 
C++ with associated extensions .c, .cc  or .cpp, .f, .f90 or .f95, 
.m, and .mm or .M, respectively. We recommend using .h  for headers, 
also for C++ or Fortran 9x include files. (Use of .C for C++ is now 
deprecated and will be removed in R 2.12.0.)

You missed 'associated extensions', and that the NEWS file says

     o	Use of file extension .C for C++ code in packages is now
 	deprecated: it has caused problems for some 'make's on
 	case-insensitive file systems (although it currently works
 	with the recommended toolkits).


On Wed, 21 Jul 2010, Florian Breitwieser wrote:
> Hi,
>
> I am writing a R package and having a bit of trouble to have the C++
> code working.
>
> I was planing using the .C interface function, however I found the
> comment (Use of ?.C? for C++ is now deprecated and will be removed in
> R 2.12.0.) in the R-exts manual.
>
> So this interface function should not be used anymore - .Call() or
> Rcpp instead? What is the reason for the deprecation?
>
> Thanks,
> Florian
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>
-- 
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)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

Hi Florian,

You could try the Rcpp package for the interface. It works pretty well for
me.

Cheers,
Yi

On Wed, Jul 21, 2010 at 10:24 PM, Florian Breitwieser
<florian.bw@gmail.com>wrote:
> Hi,
>
> I am writing a R package and having a bit of trouble to have the C++
> code working.
>
> I was planing using the .C interface function, however I found the
> comment (Use of ‘.C’ for C++ is now deprecated and will be removed in
> R 2.12.0.) in the R-exts manual.
>
> So this interface function should not be used anymore - .Call() or
> Rcpp instead? What is the reason for the deprecation?
>
> Thanks,
> Florian
>
> ______________________________________________
> R-devel@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>
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