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+/* Copyright 2003-2015 Joaquin M Lopez Munoz.
+ * 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_RAW_PTR_HPP
+#define BOOST_MULTI_INDEX_DETAIL_RAW_PTR_HPP
+
+#if defined(_MSC_VER)
+#pragma once
+#endif
+
+#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
+#include <boost/mpl/bool.hpp>
+#include <boost/type_traits/is_same.hpp>
+
+namespace boost{
+
+namespace multi_index{
+
+namespace detail{
+
+/* gets the underlying pointer of a pointer-like value */
+
+template<typename RawPointer>
+inline RawPointer raw_ptr(RawPointer const& p,mpl::true_)
+{
+  return p;
+}
+
+template<typename RawPointer,typename Pointer>
+inline RawPointer raw_ptr(Pointer const& p,mpl::false_)
+{
+  return p==Pointer(0)?0:&*p;
+}
+
+template<typename RawPointer,typename Pointer>
+inline RawPointer raw_ptr(Pointer const& p)
+{
+  return raw_ptr<RawPointer>(p,is_same<RawPointer,Pointer>());
+}
+
+} /* namespace multi_index::detail */
+
+} /* namespace multi_index */
+
+} /* namespace boost */
+
+#endif