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diff --git a/boost_ext/boost/bimap/support/iterator_type_by.hpp b/boost_ext/boost/bimap/support/iterator_type_by.hpp
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+++ b/boost_ext/boost/bimap/support/iterator_type_by.hpp
@@ -0,0 +1,228 @@
+// Boost.Bimap
+//
+// Copyright (c) 2006-2007 Matias Capeletto
+//
+// 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)
+
+/// \file support/iterator_type_by.hpp
+/// \brief Metafunctions to access the iterator types of a bimap
+
+#ifndef BOOST_BIMAP_SUPPORT_ITERATOR_TYPE_BY_HPP
+#define BOOST_BIMAP_SUPPORT_ITERATOR_TYPE_BY_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER>=1200)
+#pragma once
+#endif
+
+#include <boost/config.hpp>
+
+#include <boost/bimap/relation/detail/metadata_access_builder.hpp>
+#include <boost/bimap/relation/detail/static_access_builder.hpp>
+
+#include <boost/bimap/relation/support/pair_type_by.hpp>
+
+#include <boost/bimap/detail/map_view_iterator.hpp>
+
+/** \struct boost::bimaps::support::iterator_type_by
+
+\brief Metafunction to obtain the iterator type of the map view by one of the sides.
+
+\code
+
+template< class Tag, class Bimap >
+struct iterator_type_by
+{
+    typedef -unspecified- type;
+};
+
+template< class Tag, class Bimap >
+struct const_iterator_type_by
+{
+    typedef -unspecified- type;
+};
+
+template< class Tag, class Bimap >
+struct reverse_iterator_type_by
+{
+    typedef -unspecified- type;
+};
+
+template< class Tag, class Bimap >
+struct const_reverse_iterator_type_by
+{
+    typedef -unspecified- type;
+};
+
+template< class Tag, class Bimap >
+struct local_iterator_type_by
+{
+    typedef -unspecified- type;
+};
+
+template< class Tag, class Bimap >
+struct const_local_iterator_type_by
+{
+    typedef -unspecified- type;
+};
+
+\endcode
+
+See also member_at.
+\ingroup bimap_group
+                                                                    **/
+
+#ifndef BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES
+
+namespace boost {
+namespace bimaps {
+namespace support {
+
+
+// Implementation of iterator type by metafunction
+
+BOOST_BIMAP_SYMMETRIC_METADATA_ACCESS_BUILDER
+(
+    iterator_type_by,
+    left_iterator,
+    right_iterator
+)
+
+// Implementation of const iterator type by metafunction
+
+BOOST_BIMAP_SYMMETRIC_METADATA_ACCESS_BUILDER
+(
+    const_iterator_type_by,
+    left_const_iterator,
+    right_const_iterator
+)
+
+
+// Implementation of reverse iterator type by metafunction
+
+BOOST_BIMAP_SYMMETRIC_STATIC_ACCESS_BUILDER
+(
+    core_reverse_iterator_type_by,
+    BimapCore,
+
+    typedef BOOST_DEDUCED_TYPENAME BimapCore::core_type::BOOST_NESTED_TEMPLATE
+        index<BOOST_DEDUCED_TYPENAME BimapCore::left_tag>
+            ::type::reverse_iterator type,
+
+    typedef BOOST_DEDUCED_TYPENAME BimapCore::core_type::BOOST_NESTED_TEMPLATE
+        index<BOOST_DEDUCED_TYPENAME BimapCore::right_tag>
+            ::type::reverse_iterator type
+)
+
+template< class Tag, class BimapCore >
+struct reverse_iterator_type_by
+{
+    typedef ::boost::bimaps::detail::map_view_iterator
+    <
+        Tag,
+        BOOST_DEDUCED_TYPENAME BimapCore::relation,
+        BOOST_DEDUCED_TYPENAME core_reverse_iterator_type_by<Tag,BimapCore>::type
+
+    > type;
+};
+
+// Implementation of const reverse iterator type by metafunction
+
+BOOST_BIMAP_SYMMETRIC_STATIC_ACCESS_BUILDER
+(
+    core_const_reverse_iterator_type_by,
+    BimapCore,
+
+    typedef BOOST_DEDUCED_TYPENAME BimapCore::core_type::BOOST_NESTED_TEMPLATE
+        index<BOOST_DEDUCED_TYPENAME BimapCore::left_tag>
+            ::type::const_reverse_iterator type,
+
+    typedef BOOST_DEDUCED_TYPENAME BimapCore::core_type::BOOST_NESTED_TEMPLATE
+        index<BOOST_DEDUCED_TYPENAME BimapCore::right_tag>
+            ::type::const_reverse_iterator type
+)
+
+template< class Tag, class BimapCore >
+struct const_reverse_iterator_type_by
+{
+
+    typedef ::boost::bimaps::detail::map_view_iterator
+    <
+        Tag,
+        BOOST_DEDUCED_TYPENAME BimapCore::relation,
+        BOOST_DEDUCED_TYPENAME core_const_reverse_iterator_type_by<Tag,BimapCore>::type
+
+    > type;
+};
+
+
+// Implementation of local iterator type by metafunction
+
+BOOST_BIMAP_SYMMETRIC_STATIC_ACCESS_BUILDER
+(
+    core_local_iterator_type_by,
+    BimapCore,
+
+    typedef BOOST_DEDUCED_TYPENAME BimapCore::core_type::BOOST_NESTED_TEMPLATE
+        index<BOOST_DEDUCED_TYPENAME BimapCore::left_tag>
+            ::type::local_iterator type,
+
+    typedef BOOST_DEDUCED_TYPENAME BimapCore::core_type::BOOST_NESTED_TEMPLATE
+        index<BOOST_DEDUCED_TYPENAME BimapCore::right_tag>
+            ::type::local_iterator type
+)
+
+
+template< class Tag, class BimapCore >
+struct local_iterator_type_by
+{
+
+    typedef ::boost::bimaps::detail::map_view_iterator
+    <
+        Tag,
+        BOOST_DEDUCED_TYPENAME BimapCore::relation,
+        BOOST_DEDUCED_TYPENAME core_local_iterator_type_by<Tag,BimapCore>::type
+
+    > type;
+};
+
+
+// Implementation of const local iterator type by metafunction
+
+BOOST_BIMAP_SYMMETRIC_STATIC_ACCESS_BUILDER
+(
+    core_const_local_iterator_type_by,
+    BimapCore,
+
+    typedef BOOST_DEDUCED_TYPENAME BimapCore::core_type::BOOST_NESTED_TEMPLATE
+        index<BOOST_DEDUCED_TYPENAME BimapCore::left_tag>
+            ::type::const_local_iterator type,
+
+    typedef BOOST_DEDUCED_TYPENAME BimapCore::core_type::BOOST_NESTED_TEMPLATE
+        index<BOOST_DEDUCED_TYPENAME BimapCore::right_tag>
+            ::type::const_local_iterator type
+)
+
+template< class Tag, class BimapCore >
+struct const_local_iterator_type_by
+{
+
+    typedef ::boost::bimaps::detail::map_view_iterator
+    <
+        Tag,
+        BOOST_DEDUCED_TYPENAME BimapCore::relation,
+        BOOST_DEDUCED_TYPENAME core_const_local_iterator_type_by<Tag,BimapCore>::type
+
+    > type;
+};
+
+
+} // namespace support
+} // namespace bimaps
+} // namespace boost
+
+#endif // BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES
+
+#endif // BOOST_BIMAP_SUPPORT_ITERATOR_TYPE_BY_HPP
+