/* 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 FO, int P, typename V>class Binder : private FO, private V {  public:    // there is one less parameter because one is bound:    enum { NumParams = FO::NumParams-1 };    // the return type is straightforward:    typedef typename FO::ReturnT ReturnT;    // the parameter types:    typedef BinderParams<FO, P> Params;#define ComposeParamT(N)                                          \        typedef typename                                          \                ForwardParamT<typename Params::Param##N##T>::Type \            Param##N##T    ComposeParamT(1);    ComposeParamT(2);    ComposeParamT(3);    //...#undef ComposeParamT  //...};