Question

In the example below, I have no difficulty exporting some normal c++ method into R using RCPP_MODULE except the method clone that makes the compilation failed.

struct C
{
    void clone(C* other)
    {
         *this = *other;
    }
};

#include <Rcpp.h>
using namespace Rcpp;

RCPP_MODULE(mod){
    class_<C>("C")
        .method("clone", &C::clone)
        ;
};

How to export the clone method so I can reference to other C++ class that is created in R?

Answer 1

The following works with the development version of Rcpp. See this article on my blog.

#include <Rcpp.h>
using namespace Rcpp;

RCPP_EXPOSED_CLASS(C)

struct C
{
    void clone(const C& other)
    {
         *this = other;
    }
};

RCPP_MODULE(play){
    class_<C>("C")
        .method("clone", &C::clone)
        ;
};