47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
// Copyright David Abrahams 2002.
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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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#ifndef REFERENCE_EXISTING_OBJECT_DWA200222_HPP
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# define REFERENCE_EXISTING_OBJECT_DWA200222_HPP
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# include <boost/python/detail/prefix.hpp>
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# include <boost/python/detail/indirect_traits.hpp>
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# include <boost/mpl/if.hpp>
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# include <boost/python/to_python_indirect.hpp>
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# include <boost/type_traits/composite_traits.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 R>
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struct reference_existing_object_requires_a_pointer_or_reference_return_type
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# if defined(__GNUC__) && __GNUC__ >= 3 || defined(__EDG__)
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{}
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# endif
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;
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}
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template <class T> struct to_python_value;
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struct reference_existing_object
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{
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template <class T>
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struct apply
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{
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BOOST_STATIC_CONSTANT(
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bool, ok = is_pointer<T>::value || is_reference<T>::value);
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typedef typename mpl::if_c<
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ok
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, to_python_indirect<T, detail::make_reference_holder>
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, detail::reference_existing_object_requires_a_pointer_or_reference_return_type<T>
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>::type type;
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};
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};
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}} // namespace boost::python
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#endif // REFERENCE_EXISTING_OBJECT_DWA200222_HPP
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