Re: Virtual calls upon destruction

Jeremy Jurksztowicz wrote:

[snip]


Nope; by the time operator delete is called, all destructors will be
executed and bptr will point to uninitialized memory.

Instead, you want something like this:

class Base
{
   public:
      virtual ~Base();
      void deleteMe()
      {
         this->uninitialize();
         delete this;
      }
      virtual void uninitialize() = 0;
};

class Derived : public Base
{
   public:
      virtual void uninitialize();
};

void F()
{
   Derived* d(new Derived());
   // ...
   d->deleteMe();
}

This has the disadvantage that there's no way in general to stop
someone from deleting such a pointer directly and circumventing the
uninitialize() member function, but some improvements can be made
(e.g., making the Base destructor protected).