[Rcpp-devel] object '.pointer' not found

On Thu, Dec 2, 2010 at 2:31 PM, Andrew Redd <amredd at gmail.com> wrote:

That exposes the data3 class, but does not solve the pointer problem.

Add a default contructor.

On Thu, Dec 2, 2010 at 12:24 PM, Romain Francois <
romain at r-enthusiasts.com> wrote:

Le 02/12/10 20:05, Andrew Redd a ?crit :

 I updated to the new Rcpp 0.8.9 then added a new function to my class.

 It compiles fine the Module is found and loads the class definition
seems to be there, but when I try to create a instance of the class I
get the error:

R> new(Module("GPU_BAYES",'gpuBayes')$data3)
Error in get(".pointer", envir = env) : object '.pointer' not found

Any Ideas what might be wrong here?  That's a rather vague error.  The
traceback gives

 > traceback()

3: get(".pointer", envir = env)
2: function (object)
   standardGeneric("show")(<S4 object of class "Rcpp_data3">)
1: function (object)
   standardGeneric("show")(<S4 object of class "Rcpp_data3">)


Thanks,
Andrew

In the Rcpp-modules vignette, that has been considerably updated in the
last version of Rcpp (part of the 8661 new lines of code), we suggest to
have this in your .onLoad:

# grab the namespace
NAMESPACE <- environment()

.onLoad <- function(libname, pkgname){
       # load the module and store it in our namespace
       yada <- Module( "GPU_BAYES" )
       populate( yada, NAMESPACE  )
}

and the "data3" class is directly exposed in the namespace of your
package, so that you can do:

new( data3 )

Does that work ?


Otherwise, maybe you can try adding mustStart = TRUE to the call to
Module.

--
Romain Francois
Professional R Enthusiast
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