RE: [boost] Re: Perfect moving (almost)

From: Powell, Gary (powellg_at_[hidden])
Date: 2004-02-11 14:54:21

One other thing that makes writing base class and derived classes easier is to add this to the ref struct

class X {
   ....
private:
   struct ref {
      ref (X *rhs) : p (rhs) {}

      template<class T>           // new
      ref (T *rhs) : p(rhs) {}    // compiles if T is derived from X.

      X *p;
  };

.....
};

  Then in the derived class you can call:

class Y : public X {

....

   Y(ref rhs)
   : X (rhs.p)   // no cast needed to call X::ref 
   , id(++cnt)
   , owner(true)
   {
    ....
   }

....
};

Anyway the more I play with this the better I like it.

  Yours,
  -Gary-