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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.
// $Source: /cvsroot/boost/boost/libs/mpl/example/inherit_multiply.cpp,v $
// $Date: 2004/09/02 15:41:29 $
// $Revision: 1.4 $
#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;
}
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