{

template <class T>

struct apply

{

BOOST_STATIC_CONSTANT(

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

};