Wrapping classes with pure virtual functions
gabriel.becedillas at gmail.com
gabriel.becedillas at gmail.com
Thu Dec 14 16:57:10 EST 2006
Hi,
I'm having problems wrapping a hierarchy of classes, actually having
problems wrapping the base class. I don't need to use the WrapClass
mechanism since I don't want to override classes in Python. My code
boils down to:
class Base
{
public:
virtual ~Base()
{}
virtual void f() = 0;
};
class Derived :
public Base
{
public:
virtual void f()
{}
void g()
{}
};
int main()
{
boost::python::class_<Base> class_base("Base");
boost::python::class_<Derived> class_derived("Derived");
return 0;
}
The first line inside main (the one exporting Base) is causing the
compile time error:
error C2259: 'Base' : cannot instantiate abstract class...
The probem seems to be that struct value_holder<Base> holds a Base
member instance by value, and this is not possible since Base can't be
instantiated.
I'm using Visual Studio 2005 and boost 1.33.1.
Thanks
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