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

[Romain Francois]

Le 02/12/10 20:34, Dominick Samperi a écrit :
> On Thu, Dec 2, 2010 at 2:31 PM, Andrew Redd <amredd at gmail.com
> <mailto:amredd at gmail.com>> wrote:
>
>     That exposes the data3 class, but does not solve the pointer problem.
>
>
> Add a default contructor.

This would have been detected at compile time.

Please read the vignette that describes the feature. here is the link:
http://cran.r-project.org/web/packages/Rcpp/vignettes/Rcpp-modules.pdf

Romain

>     On Thu, Dec 2, 2010 at 12:24 PM, Romain Francois
>     <romain at r-enthusiasts.com <mailto:romain at r-enthusiasts.com>> wrote:
>
>         Le 02/12/10 20:05, Andrew Redd a écrit :
>
>             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.


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Romain Francois
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