Message-ID: <BB5D6DF9-18F6-436C-B502-B7C41F439621@r-enthusiasts.com>
Date: 2011-08-02T09:10:33Z
From: Romain Francois
Subject: [Rcpp-devel] wrap returned pointer to class
In-Reply-To: <04188079-0C52-4D87-A8CB-20DD3B099F8C@frias.uni-freiburg.de>
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
>
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