[Rcpp-devel] wrap returned pointer to class

[Sebastian Weber]

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 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
>> 
>> _______________________________________________
>> Rcpp-devel mailing list
>> Rcpp-devel at lists.r-forge.r-project.org
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-- 
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