[Rcpp-devel] wrap returned pointer to class

[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 août 2011 à 18:07, Sebastian Weber <sebastian.weber at frias.uni-freiburg.de> a écrit :

> 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-Universität Freiburg
> Albertstr. 19
> 79104 Freiburg
> T.: +49-761-203-97237
> Fax:+49-761-203-97334
> 
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