boost_mpl 0.1.0

Boost C++ library boost_mpl packaged using Zanbil
Documentation 
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// 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.

// $Id$
// $Date$
// $Revision$

#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;
}