ceph/src/boost/libs/mpl/include/boost/mpl/list/aux_/iterator.hpp

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