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