/* The following code example is taken from the book * "C++ Templates - The Complete Guide" * by David Vandevoorde and Nicolai M. Josuttis, Addison-Wesley, 2002 * * (C) Copyright David Vandevoorde and Nicolai M. Josuttis 2002. * Permission to copy, use, modify, sell and distribute this software * is granted provided this copyright notice appears in all copies. * This software is provided "as is" without express or implied * warranty, and with no claim as to its suitability for any purpose. */template<typename T>class IsClassT {  public:    enum { Yes = IsFundaT<T>::No &&                 IsEnumT<T>::No &&                 !CompoundT<T>::IsPtrT &&                 !CompoundT<T>::IsRefT &&                 !CompoundT<T>::IsArrayT &&                 !CompoundT<T>::IsPtrMemT &&                 !CompoundT<T>::IsFuncT };    enum { No = !Yes };};