[Rcpp-devel] wrap returned pointer to class

Ah, 

I need to think about this. Will give you an update if i manage to deal with it.

Romain



Le 2 ao?t 2011 ? 11:24, Sebastian Weber <sebastian.weber at frias.uni-freiburg.de> a ?crit :

Hi!

The solution you point out there is exactly what I need - but without class intrusion. The class I am wrapping is not under my control, but belongs to a third party. Or does your solution apply also in a non-intrusive case which I overlooked?

Cheers,

Sebastian

Am 02.08.2011 um 11:10 schrieb romain at r-enthusiasts.com:

Hello sebastian, 

I think what you are looking for is covered by some enhancements i added recently and described in this thread: 

http://thread.gmane.org/gmane.comp.lang.r.rcpp/2092

Romain


Le 1 ao?t 2011 ? 18:07, Sebastian Weber <sebastian.weber at frias.uni-freiburg.de> a ?crit :

Hi,

first of all thank you, Dirk and Romain, so much for this great library! I was stunned when I saw the examples.

Hence, I started immediately a quite involved project which interfaces another library to R via C++. Currently I have the problem that I want to expose a function from a class which returns a pointer to a class. When exposing via the

class_<A>.method("fun", &A::fun);

mechanism, the compiler fails with a message saying that he cannot wrap the return type of function fun. The returned object itself is a pointer to another class B. How to solve this? I tried providing the wrap call with no success.

Here is some code which might not work, but explains more detailed:

class B {};

class A {
public:
B* fun();
};

which gives, when compiled:

/Library/Frameworks/R.framework/Versions/2.13/Resources/library/Rcpp/include/Rcpp/internal/wrap.h:428: error: cannot convert ?B* const? to ?SEXPREC*? in initialization

Any ideas how to fix this?

Thanks,

PS: Is there some bug tracking tool? I got some weird problem when the function wrapped expects a char as input. I fixed it somehow, but I am not sure if it is the right way...

-- 
Sebastian Weber
Group of Cell Communication and Control
Freiburg Institute for Advanced Studies - FRIAS
School of Life Sciences - LIFENET
Albert-Ludwigs-Universit?t Freiburg
Albertstr. 19
79104 Freiburg
T.: +49-761-203-97237
Fax:+49-761-203-97334

-- 
Sebastian Weber
Group of Cell Communication and Control
Freiburg Institute for Advanced Studies - FRIAS
School of Life Sciences - LIFENET
Albert-Ludwigs-Universit?t Freiburg
Albertstr. 19
79104 Freiburg
T.: +49-761-203-97237
Fax:+49-761-203-97334