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66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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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_NEXT_05042005_1101)
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#define FUSION_NEXT_05042005_1101
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/support/tag_of.hpp>
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namespace boost { namespace fusion
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{
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// Special tags:
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struct iterator_facade_tag; // iterator facade tag
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struct boost_array_iterator_tag; // boost::array iterator tag
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struct mpl_iterator_tag; // mpl sequence iterator tag
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struct std_pair_iterator_tag; // std::pair iterator tag
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namespace extension
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{
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template <typename Tag>
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struct next_impl
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{
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template <typename Iterator>
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struct apply {};
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};
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template <>
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struct next_impl<iterator_facade_tag>
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{
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template <typename Iterator>
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struct apply : Iterator::template next<Iterator> {};
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};
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template <>
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struct next_impl<boost_array_iterator_tag>;
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template <>
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struct next_impl<mpl_iterator_tag>;
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template <>
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struct next_impl<std_pair_iterator_tag>;
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}
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namespace result_of
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{
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template <typename Iterator>
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struct next
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: extension::next_impl<typename detail::tag_of<Iterator>::type>::
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template apply<Iterator>
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{};
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}
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template <typename Iterator>
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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inline typename result_of::next<Iterator>::type const
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next(Iterator const& i)
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{
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return result_of::next<Iterator>::call(i);
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}
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}}
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#endif
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