[Swig-user] how to build the interface file for using boost::shared pointer in a ruby script?

[Sören F. <fr...@ir...>]

Hello again (sorry about last confusing email)
I have big problems with shared pointers. My goal is to add some shared
pointers of a derived class to a vector that contains shared pointers to the
base class.
But it won't work right now. Any ideas (swig version 1.3.40)?

Here a dummy code (a.cxx,run. rb, and a.i)

##########################################################
#### some simle cxx-code                               ###

class Base{
public:
Base() {}
};

typedef boost::shared_ptr<Base> BasePtr;

class Derived : public Base{
public:
Derived() {}
};

typedef boost::shared_ptr<Derived> >DerivedPtr;

##########################################################
#### ruby script                                       ###
my ruby script:

vec = VectorBasePtr.new
vec << Derived.new()

##########################################################
#### swig interface  (first try)                       ###
swig interface:
namespace boost{
   template<class T> 
   class shared_ptr{
   public:
       shared_ptr();
       shared_ptr(T* p );
   };
}
%template(BasePtr)    boost::shared_ptr<Base>;
%template(DerivedPtr) boost::shared_ptr<Derived>;
%template(VectorBasePtr) std::vector< boost::shared_ptr<Base> >;

==> ruby script failes because missing information, that I'm using shared
pointers and DerivedPtr can be casted to BasePtr

##########################################################
#### swig interface  (second try)                      ###
%SWIG_SHARED_PTR(BasePtr   , Base);
%SWIG_SHARED_PTR_DERIVED(DerivedPtr, Base, Derived);
%template(VectorBasePtr)  std::vector< boost::shared_ptr<Base> >;

==> BasePtr and DerivedPtr are unknown types in ruby


Q: How can this simple example be realized in ruby using swig?
Is it possible? Aren't the SWIG_SHARED_PTR macros supported by the ruby
parser?

Best,
SirAnn