[Rcpp-devel] getting the external pointer from a module created reference class

[Ian Fellows]

Okay, so at the risk of asking another stupid question...


I'm a bit unclear about how to write the R constructor for a class being exported via the module facility.


class Foo{
	public:
		int i;
		Foo();
		Foo(SEXP);
}



int test(Foo f){
	return f.i;
}

RCPP_MODULE(amodule){
	using namespace Rcpp ;
	function("test",&test);
	class<Foo>("Foo");
}


I assume that I need to write Foo(SEXP) in such a way that the external pointer is extracted, and then 'i' is copied over. How does one do this?


Thanks for the help,
Ian
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