Cпециализации шаблонов - Visual C++ - Ответ 209497

template <class Obj, class T> class Invoker1
{
};
 
template <class Obj, class Ret> class Invoker1<Obj, Ret Obj::*>
{
public:
  static Ret go(Obj& obj, Ret Obj::* fld)
  {
    return obj.*fld;
  }
};
 
template <class Obj, class Ret> class Invoker1<Obj, Ret (Obj::*)(void)>
{
public:
  static Ret go(Obj& obj, Ret (Obj::*fn)(void))
  {
    return (obj.*fn)();
  }
};
 
template <class Obj, class T> void invoke1(Obj& obj, T fld)
{
  Invoker1<Obj, T>::go(obj, fld);
}
 
[COLOR=SeaGreen]// Example2[/COLOR]
template <class Obj, class RetType> class Invoker2
{
public:
  static RetType go(Obj& obj, RetType Obj::* fld)
  {
    return obj.*fld;
  }
};
 
template <class Obj, class RetType> class Invoker2<Obj, RetType (void)>
{
public:
  static RetType go(Obj& obj, RetType (Obj::* fld)(void))
  {
    return (obj.*fld)();
  }
};
 
template <class Obj, class RetType> void invoke2(Obj& obj, RetType Obj::* fld)
{
  Invoker2<Obj, RetType>::go(obj, fld);
}
 
[COLOR=SeaGreen]// Какой-то класс[/COLOR]
class TestClass
{
public:
  int x;
  int f();
};
 
int TestClass::f()
{
  return 0;
}