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

[Dominick Samperi]

On Thu, Dec 2, 2010 at 2:47 PM, Romain Francois <romain at r-enthusiasts.com>wrote:

> 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.
>

What I meant is add a default contructor to the module:

.default_constructor()


>
> 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.
>>
>
>
> --
> Romain Francois
> Professional R Enthusiast
> +33(0) 6 28 91 30 30
> http://romainfrancois.blog.free.fr
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>
>
>
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