// Copyright David Abrahams 2002.

// 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 REFERENCE_EXISTING_OBJECT_DWA200222_HPP

# define REFERENCE_EXISTING_OBJECT_DWA200222_HPP



# include <boost/python/detail/prefix.hpp>

# include <boost/python/detail/indirect_traits.hpp>

# include <boost/mpl/if.hpp>

# include <boost/python/to_python_indirect.hpp>

# include <boost/type_traits/composite_traits.hpp>



namespace boost { namespace python { 



namespace detail

{

  template <class R>

  struct reference_existing_object_requires_a_pointer_or_reference_return_type

# if defined(__GNUC__) && __GNUC__ >= 3 || defined(__EDG__)

  {}

# endif

  ;

}



template <class T> struct to_python_value;



struct reference_existing_object

{

    template <class T>

    struct apply

    {

        BOOST_STATIC_CONSTANT(

            bool, ok = is_pointer<T>::value || is_reference<T>::value);

        

        typedef typename mpl::if_c<

            ok

            , to_python_indirect<T, detail::make_reference_holder>

            , detail::reference_existing_object_requires_a_pointer_or_reference_return_type<T>

        >::type type;

    };

};



}} // namespace boost::python



#endif // REFERENCE_EXISTING_OBJECT_DWA200222_HPP

