/* 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 DstT, typename SrcT>inline DstT implicit_cast (SrcT const& x)  // SrcT can be deduced,{                                          // but DstT cannot    return x;}int main(){    double value = implicit_cast<double>(-1);}