/*============================================================================= Copyright (c) 2001-2006 Joel de Guzman Copyright (c) 2006 Dan Marsden 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) ==============================================================================*/ #if !defined(BOOST_FUSION_DISTANCE_IMPL_20060223_0814) #define BOOST_FUSION_DISTANCE_IMPL_20060223_0814 #include <boost/mpl/minus.hpp> namespace example { struct example_struct_iterator_tag; } namespace boost { namespace fusion { namespace extension { template<typename Tag> struct distance_impl; template<> struct distance_impl<example::example_struct_iterator_tag> { template<typename First, typename Last> struct apply : mpl::minus<typename Last::index, typename First::index> { typedef apply<First, Last> self; static typename self::type call(First const& first, Last const& last) { return typename self::type(); } }; }; } }} #endif