[857] | 1 | /*=============================================================================
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| 2 | Copyright (c) 2003 Joel de Guzman
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| 3 | Copyright (c) 2004 Peder Holt
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| 4 | Copyright (c) 2005 Eric Niebler
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| 5 |
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| 6 | Use, modification and distribution is subject to the Boost Software
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| 7 | License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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| 8 | http://www.boost.org/LICENSE_1_0.txt)
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| 9 | ==============================================================================*/
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| 10 | #if !defined(FUSION_ITERATOR_CONS_ITERATOR_HPP)
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| 11 | #define FUSION_ITERATOR_CONS_ITERATOR_HPP
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| 12 |
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| 13 | #include <boost/mpl/aux_/na_fwd.hpp>
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| 14 | #include <boost/mpl/iterator_tags.hpp>
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| 15 | #include <boost/spirit/fusion/iterator/as_fusion_iterator.hpp>
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| 16 | #include <boost/spirit/fusion/iterator/detail/iterator_base.hpp>
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| 17 | #include <boost/spirit/fusion/sequence/detail/sequence_base.hpp>
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| 18 | #include <boost/spirit/fusion/iterator/detail/cons_iterator/deref_traits.hpp>
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| 19 | #include <boost/spirit/fusion/iterator/detail/cons_iterator/next_traits.hpp>
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| 20 | #include <boost/spirit/fusion/iterator/detail/cons_iterator/value_traits.hpp>
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| 21 |
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| 22 | namespace boost { namespace fusion
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| 23 | {
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| 24 | struct nil;
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| 25 |
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| 26 | struct cons_iterator_tag;
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| 27 |
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| 28 | template <typename Cons = nil>
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| 29 | struct cons_iterator : iterator_base<cons_iterator<Cons> >
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| 30 | {
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| 31 | typedef cons_iterator_tag tag;
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| 32 | typedef Cons cons_type;
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| 33 | typedef mpl::forward_iterator_tag category;
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| 34 |
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| 35 | #if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
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| 36 | typedef typename cons_detail::next_traits_impl<cons_iterator>::type next;
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| 37 | typedef typename cons_detail::value_traits_impl<cons_iterator>::type type;
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| 38 | #endif
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| 39 |
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| 40 | explicit cons_iterator(cons_type& cons_)
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| 41 | : cons(cons_) {}
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| 42 |
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| 43 | cons_type& cons;
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| 44 | private:
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| 45 | cons_iterator& operator=(cons_iterator const&);
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| 46 | };
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| 47 |
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| 48 | template <>
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| 49 | struct cons_iterator<nil> : iterator_base<cons_iterator<nil> >
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| 50 | {
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| 51 | typedef cons_iterator_tag tag;
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| 52 | typedef nil cons_type;
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| 53 | typedef mpl::forward_iterator_tag category;
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| 54 |
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| 55 | #if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
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| 56 | typedef cons_iterator next;
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| 57 | typedef mpl::na type;
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| 58 | #endif
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| 59 |
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| 60 | cons_iterator() {}
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| 61 | explicit cons_iterator(nil const&) {}
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| 62 | };
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| 63 |
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| 64 | template <>
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| 65 | struct cons_iterator<nil const> : iterator_base<cons_iterator<nil const> >
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| 66 | {
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| 67 | typedef cons_iterator_tag tag;
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| 68 | typedef nil const cons_type;
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| 69 | typedef mpl::forward_iterator_tag category;
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| 70 |
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| 71 | #if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
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| 72 | typedef cons_iterator next;
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| 73 | typedef mpl::na type;
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| 74 | #endif
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| 75 |
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| 76 | cons_iterator() {}
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| 77 | explicit cons_iterator(nil const&) {}
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| 78 | };
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| 79 | }}
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| 80 |
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| 81 | #endif
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