/* 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. */#ifndef ACCUM_HPP#define ACCUM_HPP#include "accumtraits4.hpp"template <typename T>inlinetypename AccumulationTraits<T>::AccT accum (T const* beg,                                            T const* end) {    // return type is traits of the element type    typedef typename AccumulationTraits<T>::AccT AccT;    AccT total = AccumulationTraits<T>::zero();    while (beg != end) {        total += *beg;        ++beg;    }    return total;}#endif // ACCUM_HPP