| |
| // Copyright Aleksey Gurtovoy 2002-2004 |
| // |
| // Distributed under the Boost Software License, Version 1.0. |
| // (See accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt) |
| // |
| // See http://www.boost.org/libs/mpl for documentation. |
| |
| // $Id: inherit_multiply.cpp 49268 2008-10-11 06:26:17Z agurtovoy $ |
| // $Date: 2008-10-11 02:26:17 -0400 (Sat, 11 Oct 2008) $ |
| // $Revision: 49268 $ |
| |
| #include <boost/mpl/inherit.hpp> |
| #include <boost/mpl/inherit_linearly.hpp> |
| #include <boost/mpl/list.hpp> |
| |
| #include <iostream> |
| |
| namespace mpl = boost::mpl; |
| using namespace mpl::placeholders; |
| |
| template< typename T > |
| struct tuple_field |
| { |
| typedef tuple_field type; // note the typedef |
| T field_; |
| }; |
| |
| template< typename T > |
| inline |
| T& field(tuple_field<T>& t) |
| { |
| return t.field_; |
| } |
| |
| typedef mpl::inherit_linearly< |
| mpl::list<int,char const*,bool> |
| , mpl::inherit< _1, tuple_field<_2> > |
| >::type my_tuple; |
| |
| |
| int main() |
| { |
| my_tuple t; |
| |
| field<int>(t) = -1; |
| field<char const*>(t) = "text"; |
| field<bool>(t) = false; |
| |
| std::cout |
| << field<int>(t) << '\n' |
| << field<char const*>(t) << '\n' |
| << field<bool>(t) << '\n' |
| ; |
| |
| return 0; |
| } |