gistfile1.txt

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What I've got
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  Hook< functor2<int,int,int> >* hook = new Hook< functor2<int,int,int> >;

  hook->addCallback((functor2<int,int,int>::ftype)&multiply);
  hook->addCallback((functor2<int,int,int>::ftype)&add);

  printf("We have %d callback(s)\n\n", hook->numCallbacks());

  functor2<int,int,int>::atype* args = new functor2<int,int,int>::atype(4, 5);

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What I'd like
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  Hook< functor2<int,int,int> >* hook = new Hook< functor2<int,int,int> >;

  hook->addCallback((hook->ftype)&multiply);
  hook->addCallback((hook->ftype)&add);

  printf("We have %d callback(s)\n\n", hook->numCallbacks());

  hook->atype* args = new hook->atype(4, 5);