/* 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 BASE_MEMBER_PAIR_HPP#define BASE_MEMBER_PAIR_HPPtemplate <typename Base, typename Member>class BaseMemberPair : private Base {  private:    Member member;  public:    // constructor    BaseMemberPair (Base const & b, Member const & m)     : Base(b), member(m) {    }    // access base class data via first()    Base const& first() const {        return (Base const&)*this;    }    Base& first() {        return (Base&)*this;    }    // access member data via second()    Member const& second() const {        return this->member;    }    Member& second() {        return this->member;    }};#endif // BASE_MEMBER_PAIR_HPP