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2 | #ifndef BOOST_MPL_LIST_AUX_ITERATOR_HPP_INCLUDED
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3 | #define BOOST_MPL_LIST_AUX_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/list/aux_/iterator.hpp,v $
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14 | // $Date: 2004/10/01 16:29:37 $
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15 | // $Revision: 1.6 $
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16 |
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17 | #include <boost/mpl/iterator_tags.hpp>
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18 | #include <boost/mpl/next_prior.hpp>
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19 | #include <boost/mpl/deref.hpp>
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20 | #include <boost/mpl/list/aux_/item.hpp>
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21 | #include <boost/mpl/aux_/na.hpp>
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22 | #include <boost/mpl/aux_/lambda_spec.hpp>
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23 | #include <boost/mpl/aux_/config/ctps.hpp>
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24 |
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25 | namespace boost { namespace mpl {
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26 |
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27 | #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
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28 |
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29 | template< typename Node >
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30 | struct l_iter
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31 | {
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32 | typedef aux::l_iter_tag tag;
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33 | typedef forward_iterator_tag category;
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34 | };
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35 |
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36 | template< typename Node >
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37 | struct deref< l_iter<Node> >
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38 | {
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39 | typedef typename Node::item type;
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40 | };
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41 |
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42 | template< typename Node >
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43 | struct next< l_iter<Node> >
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44 | {
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45 | typedef l_iter< typename Node::next > type;
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46 | };
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47 |
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48 | #else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
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49 |
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50 | template< typename Node >
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51 | struct l_iter
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52 | {
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53 | typedef aux::l_iter_tag tag;
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54 | typedef forward_iterator_tag category;
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55 | typedef typename Node::item type;
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56 | typedef l_iter< typename mpl::next<Node>::type > next;
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57 | };
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58 |
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59 | #endif
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60 |
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61 |
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62 | template<> struct l_iter<l_end>
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63 | {
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64 | typedef aux::l_iter_tag tag;
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65 | typedef forward_iterator_tag category;
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66 | #if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
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67 | typedef na type;
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68 | typedef l_iter next;
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69 | #endif
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70 | };
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71 |
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72 | BOOST_MPL_AUX_PASS_THROUGH_LAMBDA_SPEC(1, l_iter)
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73 |
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74 | }}
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75 |
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76 | #endif // BOOST_MPL_LIST_AUX_ITERATOR_HPP_INCLUDED
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