// 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