59 lines
1.1 KiB
C++
59 lines
1.1 KiB
C++
|
|
// 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;
|
|
}
|