[Rcpp-devel] Pass an Rcpp module object to a method belonging to another module from R?

[Gregory Jefferis]

Gregory Jefferis

On 10 Sep 2014, at 10:39, Romain Francois <romain at r-enthusiasts.com> wrote:

> RCPP_EXPOSED_CLASS(A)
> 
> before you declare class A and simply use this signature for the method. 
> 
> void DoSomethingWithInstanceOfA(const A& )


I used this approach happily in the nabor package (on github) but the only caveat is that from R you need to call with something like:

A$method(B$.CppObject)

You can get some interesting crashes if you pass the R reference class (i.e. B) directly as the argument. I guess it might be better to have a derived R class that looks after extracting the .CppObject field. 

Best,

Greg.