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- /*=============================================================================
- Copyright (c) 2001-2011 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(FUSION_ADVANCE_IMPL_20061024_2021)
- #define FUSION_ADVANCE_IMPL_20061024_2021
- #include <boost/fusion/support/config.hpp>
- #include <boost/fusion/view/zip_view/zip_view_iterator_fwd.hpp>
- #include <boost/fusion/iterator/advance.hpp>
- #include <boost/fusion/algorithm/transformation/transform.hpp>
- #include <boost/type_traits/remove_reference.hpp>
- namespace boost { namespace fusion {
- struct zip_view_iterator_tag;
- namespace detail
- {
- template<typename N>
- struct poly_advance
- {
- template<typename Sig>
- struct result;
- template<typename N1, typename It>
- struct result<poly_advance<N1>(It)>
- {
- typedef typename remove_reference<It>::type it;
- typedef typename result_of::advance<it,N>::type type;
- };
- template<typename It>
- BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
- typename result<poly_advance(It)>::type
- operator()(const It& it) const
- {
- return fusion::advance<N>(it);
- }
- };
- }
- namespace extension
- {
- template<typename Tag>
- struct advance_impl;
- template<>
- struct advance_impl<zip_view_iterator_tag>
- {
- template<typename It, typename N>
- struct apply
- {
- typedef zip_view_iterator<
- typename result_of::transform<typename It::iterators, detail::poly_advance<N> >::type> type;
- BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
- static type
- call(It const& it)
- {
- return type(
- fusion::transform(it.iterators_, detail::poly_advance<N>()));
- }
- };
- };
- }
- }}
- #endif
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