This commit was manufactured by cvs2svn to create branch

'unlabeled-1.2.2'.

[SVN r13259]

include/boost/python/object/select_holder.hpp

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+// Copyright David Abrahams 2002. Permission to copy, use,
+// modify, sell and distribute this software is granted provided this
+// copyright notice appears in all copies. This software is provided
+// "as is" without express or implied warranty, and with no claim as
+// to its suitability for any purpose.
+#ifndef SELECT_HOLDER_DWA2002322_HPP
+# define SELECT_HOLDER_DWA2002322_HPP
+
+# include <boost/python/has_back_reference.hpp>
+# include <boost/python/detail/not_specified.hpp>
+# include <boost/python/detail/pointee.hpp>
+# include <boost/python/detail/if_else.hpp>
+# include <boost/python/object/value_holder.hpp>
+# include <boost/python/object/pointer_holder.hpp>
+# include <boost/type.hpp>
+# include <boost/mpl/select_type.hpp>
+
+namespace boost { namespace python { namespace objects {
+
+namespace detail
+{
+  template <class T, class Held>
+  struct select_value_holder
+  {
+      BOOST_STATIC_CONSTANT(bool, selector = (!is_same<T,Held>::value) | has_back_reference<T>::value);
+  
+      typedef typename mpl::select_type<
+          selector
+          , value_holder_back_reference<T,Held>
+          , value_holder<T>
+      >::type holder;
+
+      static holder* get() { return 0; }
+  };
+
+  template <class T,class Ptr>
+  struct select_pointer_holder
+  {
+      typedef typename python::detail::pointee<Ptr>::type pointee;
+      BOOST_STATIC_CONSTANT(bool, selector = (!is_same<T,pointee>::value) | has_back_reference<T>::value);
+      
+      typedef typename mpl::select_type<
+          selector
+          , pointer_holder_back_reference<Ptr,T>
+          , pointer_holder<Ptr,T>
+      >::type holder;
+      
+      static holder* get() { return 0; }
+  };
+}
+
+template <class T, class NotSpecified>
+inline detail::select_value_holder<T,T> select_holder(python::detail::not_specified*, T* = 0, NotSpecified* = 0)
+{
+    return detail::select_value_holder<T,T>();
+}
+
+template <class T, class Held>
+inline detail::select_value_holder<T, Held> select_holder(T*, Held* = 0)
+{
+    return detail::select_value_holder<T, Held>();
+}
+
+
+template <class T, class Ptr>
+detail::select_pointer_holder<T,Ptr> select_holder(void*, Ptr* = 0, T* = 0)
+{
+    return detail::select_pointer_holder<T,Ptr>();
+}
+
+}}} // namespace boost::python::objects
+
+#endif // SELECT_HOLDER_DWA2002322_HPP