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diff --git a/boost/geometry/index/detail/translator.hpp b/boost/geometry/index/detail/translator.hpp
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+++ b/boost/geometry/index/detail/translator.hpp
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+// Boost.Geometry Index
+//
+// Copyright (c) 2011-2013 Adam Wulkiewicz, Lodz, Poland.
+//
+// Use, modification and distribution is subject to 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)
+
+#ifndef BOOST_GEOMETRY_INDEX_DETAIL_TRANSLATOR_HPP
+#define BOOST_GEOMETRY_INDEX_DETAIL_TRANSLATOR_HPP
+
+namespace boost { namespace geometry { namespace index {
+
+namespace detail {
+
+template <typename IndexableGetter, typename EqualTo>
+struct translator
+    : public IndexableGetter
+    , public EqualTo
+{
+    typedef typename IndexableGetter::result_type result_type;
+
+    translator(IndexableGetter const& i, EqualTo const& e)
+        : IndexableGetter(i), EqualTo(e)
+    {}
+
+    template <typename Value>
+    result_type operator()(Value const& value) const
+    {
+        return IndexableGetter::operator()(value);
+    }
+
+    template <typename Value>
+    bool equals(Value const& v1, Value const& v2) const
+    {
+        return EqualTo::operator()(v1, v2);
+    }
+};
+
+template <typename IndexableGetter>
+struct result_type
+{
+    typedef typename IndexableGetter::result_type type;
+};
+
+template <typename IndexableGetter>
+struct indexable_type
+{
+    typedef typename boost::remove_const<
+        typename boost::remove_reference<
+            typename result_type<IndexableGetter>::type
+        >::type
+    >::type type;
+};
+
+} // namespace detail
+
+}}} // namespace boost::geometry::index
+
+#endif // BOOST_GEOMETRY_INDEX_DETAIL_TRANSLATOR_HPP