// Copyright David Abrahams 2004. Distributed under the Boost
// Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#include 
#include 
using namespace boost::python;
using namespace boost;

struct Product {};
typedef shared_ptr ProductPtr;


struct Creator
{
   virtual ~Creator() {}
   virtual ProductPtr create() = 0;
};


struct Factory
{
   void reg(Creator* c) { mC = c; }
   ProductPtr create()
   {
      std::cout