In the interest of learning, I have a question regarding libsigc++ that I would appreciate if you could answer when (if?) you get a spare moment.
For a class project I needed some way of being able to store and call callback functions to class member functions without using static class function stubs and void pointers. I developed a simple system using an abstract Functor(N) base class with concrete FunctorPF(N) and FunctorMF(N) classes wrapped in a Callback class. The two concrete Functor classes know how to make callbacks to regular function pointers and member function pointers. The Callback class holds a pointer to the base class and makes a virtual function call to execute the proper callback. I then stumbled on libsigc++ and was curious about your implementation. There seems to be some sort of template or reinterpret_cast magic going on that I don't yet understand. I'm curious how in libsigc++ a signal maintains a list of base classes, and yet calls the proper function without making a virtual function call. If you have a moment to give me a quick explanation, I would appreciate it! Thanks, Nick _______________________________________________ libsigc-list mailing list libsigc-list@gnome.org http://mail.gnome.org/mailman/listinfo/libsigc-list
