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63 lines
2.1 KiB
63 lines
2.1 KiB
3 years ago
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/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Copyright (c) 2005-2006 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(FUSION_DISTANCE_IMPL_13122005_2139)
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#define FUSION_DISTANCE_IMPL_13122005_2139
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/iterator/distance.hpp>
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namespace boost { namespace fusion {
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struct transform_view_iterator_tag;
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struct transform_view_iterator2_tag;
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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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// Unary Version
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template<>
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struct distance_impl<transform_view_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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: result_of::distance<typename First::first_type, typename Last::first_type>
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{
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static
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typename result_of::distance<typename First::first_type, typename Last::first_type>::type
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call(First const& first, Last const& last)
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{
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return boost::fusion::distance(first.first, last.first);
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}
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};
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};
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// Binary Version
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template<>
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struct distance_impl<transform_view_iterator2_tag>
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{
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template<typename First, typename Last>
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struct apply
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: result_of::distance<typename First::first1_type, typename Last::first1_type>
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{
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static
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typename result_of::distance<typename First::first1_type, typename Last::first1_type>::type
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call(First const& first, Last const& last)
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{
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return boost::fusion::distance(first.first1, last.first1);
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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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