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diff --git a/cutl/details/boost/smart_ptr/detail/sp_convertible.hpp b/cutl/details/boost/smart_ptr/detail/sp_convertible.hpp
new file mode 100644
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+++ b/cutl/details/boost/smart_ptr/detail/sp_convertible.hpp
@@ -0,0 +1,76 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SP_CONVERTIBLE_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_CONVERTIBLE_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//  detail/sp_convertible.hpp
+//
+//  Copyright 2008 Peter Dimov
+//
+//  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
+
+#include <cutl/details/boost/config.hpp>
+
+#if !defined( BOOST_SP_NO_SP_CONVERTIBLE ) && defined( BOOST_NO_SFINAE )
+# define BOOST_SP_NO_SP_CONVERTIBLE
+#endif
+
+#if !defined( BOOST_SP_NO_SP_CONVERTIBLE ) && defined( __GNUC__ ) && ( __GNUC__ * 100 + __GNUC_MINOR__ < 303 )
+# define BOOST_SP_NO_SP_CONVERTIBLE
+#endif
+
+#if !defined( BOOST_SP_NO_SP_CONVERTIBLE ) && defined( __BORLANDC__ ) && ( __BORLANDC__ < 0x630 )
+# define BOOST_SP_NO_SP_CONVERTIBLE
+#endif
+
+#if !defined( BOOST_SP_NO_SP_CONVERTIBLE )
+
+namespace cutl_details_boost
+{
+
+namespace detail
+{
+
+template< class Y, class T > struct sp_convertible
+{
+    typedef char (&yes) [1];
+    typedef char (&no)  [2];
+
+    static yes f( T* );
+    static no  f( ... );
+
+    enum _vt { value = sizeof( (f)( static_cast<Y*>(0) ) ) == sizeof(yes) };
+};
+
+struct sp_empty
+{
+};
+
+template< bool > struct sp_enable_if_convertible_impl;
+
+template<> struct sp_enable_if_convertible_impl<true>
+{
+    typedef sp_empty type;
+};
+
+template<> struct sp_enable_if_convertible_impl<false>
+{
+};
+
+template< class Y, class T > struct sp_enable_if_convertible: public sp_enable_if_convertible_impl< sp_convertible< Y, T >::value >
+{
+};
+
+} // namespace detail
+
+} // namespace cutl_details_boost
+
+#endif // !defined( BOOST_SP_NO_SP_CONVERTIBLE )
+
+#endif  // #ifndef BOOST_SMART_PTR_DETAIL_SP_CONVERTIBLE_HPP_INCLUDED