| 1 | // Copyright David Abrahams 2002. |
|---|---|
| 2 | // Distributed under the Boost Software License, Version 1.0. (See |
| 3 | // accompanying file LICENSE_1_0.txt or copy at |
| 4 | // http://www.boost.org/LICENSE_1_0.txt) |
| 5 | #ifndef REFERENCE_EXISTING_OBJECT_DWA200222_HPP |
| 6 | # define REFERENCE_EXISTING_OBJECT_DWA200222_HPP |
| 7 | |
| 8 | # include <boost/python/detail/prefix.hpp> |
| 9 | # include <boost/python/detail/indirect_traits.hpp> |
| 10 | # include <boost/mpl/if.hpp> |
| 11 | # include <boost/python/to_python_indirect.hpp> |
| 12 | # include <boost/type_traits/composite_traits.hpp> |
| 13 | |
| 14 | namespace boost { namespace python { |
| 15 | |
| 16 | namespace detail |
| 17 | { |
| 18 | template <class R> |
| 19 | struct reference_existing_object_requires_a_pointer_or_reference_return_type |
| 20 | # if defined(__GNUC__) || defined(__EDG__) |
| 21 | {} |
| 22 | # endif |
| 23 | ; |
| 24 | } |
| 25 | |
| 26 | template <class T> struct to_python_value; |
| 27 | |
| 28 | struct reference_existing_object |
| 29 | { |
| 30 | template <class T> |
| 31 | struct apply |
| 32 | { |
| 33 | BOOST_STATIC_CONSTANT( |
| 34 | bool, ok = is_pointer<T>::value || is_reference<T>::value); |
| 35 | |
| 36 | typedef typename mpl::if_c< |
| 37 | ok |
| 38 | , to_python_indirect<T, detail::make_reference_holder> |
| 39 | , detail::reference_existing_object_requires_a_pointer_or_reference_return_type<T> |
| 40 | >::type type; |
| 41 | }; |
| 42 | }; |
| 43 | |
| 44 | }} // namespace boost::python |
| 45 | |
| 46 | #endif // REFERENCE_EXISTING_OBJECT_DWA200222_HPP |
| 47 |