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 |
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5 | Use, modification and distribution is subject to the Boost Software
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6 | License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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7 | http://www.boost.org/LICENSE_1_0.txt)
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8 | ==============================================================================*/
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9 | #if !defined(FUSION_ITERATOR_TUPLE_ITERATOR_HPP)
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10 | #define FUSION_ITERATOR_TUPLE_ITERATOR_HPP
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11 |
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12 | #include <boost/mpl/int.hpp>
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13 | #include <boost/mpl/eval_if.hpp>
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14 | #include <boost/spirit/fusion/iterator/detail/iterator_base.hpp>
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15 | #include <boost/spirit/fusion/iterator/detail/tuple_iterator/deref_traits.hpp>
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16 | #include <boost/spirit/fusion/iterator/detail/tuple_iterator/value_traits.hpp>
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17 | #include <boost/spirit/fusion/iterator/detail/tuple_iterator/next_traits.hpp>
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18 | #include <boost/spirit/fusion/iterator/detail/tuple_iterator/prior_traits.hpp>
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19 | #include <boost/spirit/fusion/iterator/detail/tuple_iterator/equal_to_traits.hpp>
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20 | #include <boost/spirit/fusion/sequence/detail/tuple_begin_end_traits.hpp>
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21 | #include <boost/mpl/eval_if.hpp>
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22 | #include <boost/mpl/less.hpp>
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23 | #include <boost/mpl/identity.hpp>
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24 |
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25 | namespace boost { namespace fusion
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26 | {
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27 | struct tuple_iterator_tag;
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28 | struct void_t;
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29 |
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30 | template <int N, typename Tuple>
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31 | struct tuple_iterator;
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32 |
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33 | template <int N, typename Tuple>
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34 | struct tuple_iterator_base : iterator_base<tuple_iterator<N, Tuple> >
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35 | {
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36 | typedef FUSION_INT(N) index;
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37 | typedef Tuple tuple;
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38 | typedef tuple_iterator_tag tag;
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39 | typedef tuple_iterator<N, Tuple> self_type;
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40 | };
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41 |
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42 | template <int N, typename Tuple>
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43 | struct tuple_iterator : tuple_iterator_base<N,Tuple>
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44 | {
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45 | typedef typename tuple_iterator_base<N,Tuple>::tuple tuple;
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46 | typedef typename tuple_iterator_base<N,Tuple>::index index;
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47 | typedef typename
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48 | mpl::eval_if<
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49 | mpl::less<index, typename Tuple::size>
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50 | , detail::tuple_iterator_next_traits_impl<tuple_iterator_base<N,Tuple> >
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51 | , mpl::identity<void_t>
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52 | >::type
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53 | next;
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54 |
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55 | typedef typename
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56 | mpl::eval_if<
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57 | mpl::less<index, typename Tuple::size>
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58 | , detail::tuple_iterator_value_traits_impl<tuple_iterator_base<N,Tuple> >
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59 | , mpl::identity<void_t>
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60 | >::type
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61 | type;
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62 |
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63 | #if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
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64 | tuple_iterator(tuple_iterator const& i);
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65 | #else
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66 | template <int N2, typename Tuple2>
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67 | tuple_iterator(tuple_iterator<N2, Tuple2> const& i)
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68 | : t(static_cast<tuple&>(i.get_tuple())) {}
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69 | #endif
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70 | tuple_iterator(tuple& t);
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71 |
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72 | tuple&
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73 | get_tuple() const;
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74 | private:
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75 |
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76 | tuple& t;
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77 | };
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78 |
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79 | #if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
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80 | template <int N, typename Tuple>
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81 | tuple_iterator<N,Tuple>::tuple_iterator(tuple_iterator const& i)
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82 | : t(static_cast<tuple&>(i.get_tuple())) {}
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83 | #endif
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84 |
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85 | template <int N, typename Tuple>
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86 | tuple_iterator<N,Tuple>::tuple_iterator(tuple& t)
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87 | : t(t) {}
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88 |
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89 | template <int N, typename Tuple>
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90 | typename tuple_iterator<N,Tuple>::tuple&
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91 | tuple_iterator<N,Tuple>::get_tuple() const
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92 | {
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93 | return t;
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94 | }
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95 | }}
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96 |
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97 | #endif
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