| 1 | // Copyright Gottfried Ganßauge 2003. |
|---|---|
| 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 | /* |
| 6 | * Generic Return value converter generator for opaque C++-pointers |
| 7 | */ |
| 8 | # ifndef RETURN_OPAQUE_POINTER_HPP_ |
| 9 | # define RETURN_OPAQUE_POINTER_HPP_ |
| 10 | |
| 11 | # include <boost/python/detail/prefix.hpp> |
| 12 | # include <boost/python/opaque_pointer_converter.hpp> |
| 13 | # include <boost/python/detail/force_instantiate.hpp> |
| 14 | # include <boost/python/to_python_value.hpp> |
| 15 | # include <boost/python/detail/value_arg.hpp> |
| 16 | # include <boost/mpl/assert.hpp> |
| 17 | |
| 18 | namespace boost { namespace python { |
| 19 | |
| 20 | namespace detail |
| 21 | { |
| 22 | template <class Pointee> |
| 23 | static void opaque_pointee(Pointee const volatile*) |
| 24 | { |
| 25 | force_instantiate(opaque<Pointee>::instance); |
| 26 | } |
| 27 | } |
| 28 | |
| 29 | struct return_opaque_pointer |
| 30 | { |
| 31 | template <class R> |
| 32 | struct apply |
| 33 | { |
| 34 | BOOST_MPL_ASSERT_MSG( is_pointer<R>::value, RETURN_OPAQUE_POINTER_EXPECTS_A_POINTER_TYPE, (R)); |
| 35 | |
| 36 | struct type : |
| 37 | boost::python::to_python_value< |
| 38 | typename detail::value_arg<R>::type |
| 39 | > |
| 40 | { |
| 41 | type() { detail::opaque_pointee(R()); } |
| 42 | }; |
| 43 | }; |
| 44 | }; |
| 45 | |
| 46 | }} // namespace boost::python |
| 47 | # endif // RETURN_OPAQUE_POINTER_HPP_ |
| 48 |