[Swig-user] Polymorphic return types for C#

[Stephane R. <ste...@rw...>]

Hello,

I'm trying to make some polymorphic code (C++ code returning a pointer 
to a base object in a factory )

I found http://thread.gmane.org/gmane.comp.programming.swig/3659 from 
2004 on the archives.
Is there any new feature of SWIG I can use ?

At the moment, I'm planning to do something like

in C++ (psuedocode):

enum ShapeType
{
   st_Invalid,
   st_Box,
   st_Sphere
}
class Shape
{
    ShapeType GetShapeType();
};
class Box : public Shape
{
}
class Sphere : public Shape
{
    Sphere(Shape* shp)
	{
             if ( !shp->iskindof(Sphere) )
                type = st_Invalid;
             else
		{
                type = st_Sphere;
                Sphere* s = (Sphere*)shp;
                this->_radius = s->_radius;
		}	
	}
}


Shape* CreateShape(const std::string& name);


in C# (pseudocode):

Shape shp = CreateShape("sphere");
if ( shp.GetShapeType() == ShapeType.st_Sphere)
{
  shp = new Sphere(shp);
}


any other idea ?

Thanks ,

Stephane Routelous
http://www.exotk.org