Imported existing code

libraries/include/boost/python/converter/shared_ptr_to_python.hpp

@@ -0,0 +1,28 @@
+// Copyright David Abrahams 2003.
+// 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)
+#ifndef SHARED_PTR_TO_PYTHON_DWA2003224_HPP
+# define SHARED_PTR_TO_PYTHON_DWA2003224_HPP
+
+# include <boost/python/refcount.hpp>
+# include <boost/python/converter/shared_ptr_deleter.hpp>
+# include <boost/shared_ptr.hpp>
+# include <boost/get_pointer.hpp>
+
+namespace boost { namespace python { namespace converter { 
+
+template <class T>
+PyObject* shared_ptr_to_python(shared_ptr<T> const& x)
+{
+    if (!x)
+        return python::detail::none();
+    else if (shared_ptr_deleter* d = boost::get_deleter<shared_ptr_deleter>(x))
+        return incref( get_pointer( d->owner ) );
+    else
+        return converter::registered<shared_ptr<T> const&>::converters.to_python(&x);
+}
+
+}}} // namespace boost::python::converter
+
+#endif // SHARED_PTR_TO_PYTHON_DWA2003224_HPP