45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Copyright (c) 2006 Dan Marsden
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#if !defined(BOOST_FUSION_DISTANCE_IMPL_20060223_0814)
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#define BOOST_FUSION_DISTANCE_IMPL_20060223_0814
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#include <boost/mpl/minus.hpp>
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namespace example
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{
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struct example_struct_iterator_tag;
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}
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namespace boost { namespace fusion {
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namespace extension
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{
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template<typename Tag>
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struct distance_impl;
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template<>
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struct distance_impl<example::example_struct_iterator_tag>
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{
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template<typename First, typename Last>
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struct apply
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: mpl::minus<typename Last::index, typename First::index>
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{
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typedef apply<First, Last> self;
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static typename self::type
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call(First const& first, Last const& last)
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{
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return typename self::type();
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}
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};
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};
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}
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}}
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#endif
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