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2018-02-08 21:28:33 -05:00
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+
+#ifndef BOOST_MPL_LIST_AUX_ITERATOR_HPP_INCLUDED
+#define BOOST_MPL_LIST_AUX_ITERATOR_HPP_INCLUDED
+
+// Copyright Aleksey Gurtovoy 2000-2004
+//
+// Distributed under the Boost Software License, Version 1.0. 
+// (See accompanying file LICENSE_1_0.txt or copy at 
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+// See http://www.boost.org/libs/mpl for documentation.
+
+// $Id$
+// $Date$
+// $Revision$
+
+#include <boost/mpl/iterator_tags.hpp>
+#include <boost/mpl/next_prior.hpp>
+#include <boost/mpl/deref.hpp>
+#include <boost/mpl/list/aux_/item.hpp>
+#include <boost/mpl/aux_/na.hpp>
+#include <boost/mpl/aux_/lambda_spec.hpp>
+#include <boost/mpl/aux_/config/ctps.hpp>
+
+namespace boost { namespace mpl {
+
+#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
+
+template< typename Node >
+struct l_iter
+{
+    typedef aux::l_iter_tag tag;
+    typedef forward_iterator_tag category;
+};
+
+template< typename Node >
+struct deref< l_iter<Node> >
+{
+    typedef typename Node::item type;
+};
+
+template< typename Node >
+struct next< l_iter<Node> >
+{
+    typedef l_iter< typename Node::next > type;
+};
+
+#else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+
+template< typename Node >
+struct l_iter
+{
+    typedef aux::l_iter_tag tag;
+    typedef forward_iterator_tag category;
+    typedef typename Node::item type;
+    typedef l_iter< typename mpl::next<Node>::type > next;
+};
+
+#endif
+
+
+template<> struct l_iter<l_end>
+{
+    typedef aux::l_iter_tag tag;
+    typedef forward_iterator_tag category;
+#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
+    typedef na type;
+    typedef l_iter next;
+#endif
+};
+
+BOOST_MPL_AUX_PASS_THROUGH_LAMBDA_SPEC(1, l_iter)
+
+}}
+
+#endif // BOOST_MPL_LIST_AUX_ITERATOR_HPP_INCLUDED