Hello, I have the need to write the equivalent of Python class methods in C++.
Chuck Allison proposes the following (http://www.artima.com/cppsource/simple.html): #include <iostream> using namespace std; // A base class that provides counting template<class T> class Counted { static int count; public: Counted() { ++count; } Counted(const Counted<T>&) { ++count; } ~Counted() { --count; } static int getCount() { return count; } }; template<class T> int Counted<T>::count = 0; // Curious class definitions class CountedClass : public Counted<CountedClass> {}; class CountedClass2 : public Counted<CountedClass2> {}; It apparently works but in fact it doesn't: If you derive from such a class, you get the count of the parent class, not of the derived class. class CountedClass3 : public CountedClass {}; int main() { CountedClass a; cout << CountedClass::getCount() << endl; // 1 CountedClass b; cout << CountedClass::getCount() << endl; // 2 CountedClass3 c; cout << CountedClass3::getCount() << endl; // 3 and should be 1 cout << CountedClass::getCount() << endl; // 3 and should be 2 } I am no C++ expert but i guess there might be some in the Python and C++ newsgroups. Alain -- http://mail.python.org/mailman/listinfo/python-list
