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diff --git a/boost_ext/boost/multi_index/detail/converter.hpp b/boost_ext/boost/multi_index/detail/converter.hpp
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+/* Copyright 2003-2005 Joaquín M López Muñoz.
+ * 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/multi_index for library home page.
+ */
+
+#ifndef BOOST_MULTI_INDEX_DETAIL_CONVERTER_HPP
+#define BOOST_MULTI_INDEX_DETAIL_CONVERTER_HPP
+
+#if defined(_MSC_VER)&&(_MSC_VER>=1200)
+#pragma once
+#endif
+
+namespace boost{
+
+namespace multi_index{
+
+namespace detail{
+
+/* converter offers means to access indices of a given multi_index_container
+ * and for convertibilty between index iterators, so providing a
+ * localized access point for get() and project() functions.
+ */
+
+template<typename MultiIndexContainer,typename Index>
+struct converter
+{
+  static const Index& index(const MultiIndexContainer& x){return x;}
+  static Index&       index(MultiIndexContainer& x){return x;}
+
+  static typename Index::const_iterator const_iterator(
+    const MultiIndexContainer& x,typename MultiIndexContainer::node_type* node)
+  {
+    return x.Index::make_iterator(node);
+  }
+
+  static typename Index::iterator iterator(
+    MultiIndexContainer& x,typename MultiIndexContainer::node_type* node)
+  {
+    return x.Index::make_iterator(node);
+  }
+};
+
+} /* namespace multi_index::detail */
+
+} /* namespace multi_index */
+
+} /* namespace boost */
+
+#endif