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2 | #ifndef BOOST_MPL_AUX_VECTOR_ITERATOR_HPP_INCLUDED
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3 | #define BOOST_MPL_AUX_VECTOR_ITERATOR_HPP_INCLUDED
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4 |
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5 | // Copyright Aleksey Gurtovoy 2000-2004
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6 | //
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7 | // Distributed under the Boost Software License, Version 1.0.
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8 | // (See accompanying file LICENSE_1_0.txt or copy at
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9 | // http://www.boost.org/LICENSE_1_0.txt)
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10 | //
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11 | // See http://www.boost.org/libs/mpl for documentation.
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12 |
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13 | // $Source: /cvsroot/boost/boost/boost/mpl/vector/aux_/iterator.hpp,v $
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14 | // $Date: 2004/11/28 01:52:12 $
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15 | // $Revision: 1.11 $
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16 |
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17 | #include <boost/mpl/vector/aux_/at.hpp>
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18 | #include <boost/mpl/iterator_tags.hpp>
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19 | #include <boost/mpl/plus.hpp>
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20 | #include <boost/mpl/minus.hpp>
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21 | #include <boost/mpl/advance_fwd.hpp>
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22 | #include <boost/mpl/distance_fwd.hpp>
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23 | #include <boost/mpl/next.hpp>
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24 | #include <boost/mpl/prior.hpp>
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25 | #include <boost/mpl/aux_/nttp_decl.hpp>
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26 | #include <boost/mpl/aux_/value_wknd.hpp>
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27 | #include <boost/mpl/aux_/config/ctps.hpp>
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28 | #include <boost/mpl/aux_/config/workaround.hpp>
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29 |
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30 | namespace boost { namespace mpl {
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31 |
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32 | template<
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33 | typename Vector
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34 | , BOOST_MPL_AUX_NTTP_DECL(long, n_)
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35 | >
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36 | struct v_iter
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37 | {
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38 | typedef aux::v_iter_tag tag;
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39 | typedef random_access_iterator_tag category;
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40 | typedef typename v_at<Vector,n_>::type type;
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41 |
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42 | typedef Vector vector_;
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43 | typedef mpl::long_<n_> pos;
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44 |
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45 | #if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
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46 | enum {
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47 | next_ = n_ + 1
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48 | , prior_ = n_ - 1
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49 | , pos_ = n_
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50 | };
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51 |
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52 | typedef v_iter<Vector,next_> next;
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53 | typedef v_iter<Vector,prior_> prior;
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54 | #endif
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55 |
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56 | };
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57 |
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58 |
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59 | #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
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60 |
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61 | template<
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62 | typename Vector
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63 | , BOOST_MPL_AUX_NTTP_DECL(long, n_)
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64 | >
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65 | struct next< v_iter<Vector,n_> >
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66 | {
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67 | typedef v_iter<Vector,(n_ + 1)> type;
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68 | };
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69 |
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70 | template<
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71 | typename Vector
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72 | , BOOST_MPL_AUX_NTTP_DECL(long, n_)
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73 | >
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74 | struct prior< v_iter<Vector,n_> >
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75 | {
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76 | typedef v_iter<Vector,(n_ - 1)> type;
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77 | };
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78 |
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79 | template<
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80 | typename Vector
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81 | , BOOST_MPL_AUX_NTTP_DECL(long, n_)
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82 | , typename Distance
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83 | >
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84 | struct advance< v_iter<Vector,n_>,Distance>
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85 | {
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86 | typedef v_iter<
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87 | Vector
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88 | , (n_ + BOOST_MPL_AUX_NESTED_VALUE_WKND(long, Distance))
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89 | > type;
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90 | };
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91 |
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92 | template<
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93 | typename Vector
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94 | , BOOST_MPL_AUX_NTTP_DECL(long, n_)
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95 | , BOOST_MPL_AUX_NTTP_DECL(long, m_)
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96 | >
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97 | struct distance< v_iter<Vector,n_>, v_iter<Vector,m_> >
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98 | : mpl::long_<(m_ - n_)>
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99 | {
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100 | };
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101 |
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102 | #else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
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103 |
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104 | template<> struct advance_impl<aux::v_iter_tag>
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105 | {
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106 | template< typename Iterator, typename N > struct apply
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107 | {
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108 | enum { pos_ = Iterator::pos_, n_ = N::value };
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109 | typedef v_iter<
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110 | typename Iterator::vector_
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111 | , (pos_ + n_)
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112 | > type;
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113 | };
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114 | };
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115 |
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116 | template<> struct distance_impl<aux::v_iter_tag>
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117 | {
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118 | template< typename Iter1, typename Iter2 > struct apply
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119 | {
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120 | enum { pos1_ = Iter1::pos_, pos2_ = Iter2::pos_ };
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121 | typedef long_<( pos2_ - pos1_ )> type;
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122 | BOOST_STATIC_CONSTANT(long, value = ( pos2_ - pos1_ ));
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123 | };
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124 | };
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125 |
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126 | #endif
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127 |
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128 | }}
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129 |
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130 | #endif // BOOST_MPL_AUX_VECTOR_ITERATOR_HPP_INCLUDED
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