[C++-sig] Derived C++ types in Python

[Brian Hall]

Hello all,

Do C++ types in python automatically get cast to the most specific type as
they cross the python barrier?  I know this code below isn't quite right,
but I'm just trying to illustrate the concept.


class A
{
 int doSomething();
};

class B : public A
{
 int doSomethingElse();
}

class C
{
  int doSomethingElseEntirely();
  void fillPtr() { myptr = new B; }
  A* myptr;
}

// python class
class D(C):
   def __init__(self):
      self.fillPtr()

   def anotherfunc(self):
      self.myptr.doSomethingElse()

Assuming I have something like the classes above, and assuming they've all
been properly exposed.  If my python class D had its myptr member
initialized on the C++ side with a class B instance, would the python side
know about it?  Would the exposed myptr member have access to all of the
exposed methods on the derived type?

Thanks!

Brian Hall