48 lines
1.3 KiB
Plaintext
48 lines
1.3 KiB
Plaintext
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// Copyright Gottfried Gan<61>auge 2003.
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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/*
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* Generic Return value converter generator for opaque C++-pointers
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*/
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# ifndef RETURN_OPAQUE_POINTER_HPP_
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# define RETURN_OPAQUE_POINTER_HPP_
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# include <boost/python/detail/prefix.hpp>
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# include <boost/python/opaque_pointer_converter.hpp>
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# include <boost/python/detail/force_instantiate.hpp>
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# include <boost/python/to_python_value.hpp>
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# include <boost/python/detail/value_arg.hpp>
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# include <boost/mpl/assert.hpp>
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namespace boost { namespace python {
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namespace detail
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{
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template <class Pointee>
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static void opaque_pointee(Pointee const volatile*)
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{
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force_instantiate(opaque<Pointee>::instance);
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}
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}
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struct return_opaque_pointer
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{
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template <class R>
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struct apply
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{
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BOOST_MPL_ASSERT_MSG( is_pointer<R>::value, RETURN_OPAQUE_POINTER_EXPECTS_A_POINTER_TYPE, (R));
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struct type :
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boost::python::to_python_value<
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typename detail::value_arg<R>::type
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>
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{
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type() { detail::opaque_pointee(R()); }
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};
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};
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};
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}} // namespace boost::python
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# endif // RETURN_OPAQUE_POINTER_HPP_
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