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GeezerVison is showing github.com — python/include/boost/python/reference_existing_object.hpp at develop · gladk/python

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reference_existing_object.hpp

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// 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/python/detail/type_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__) || defined(__EDG__)
{}
# endif
;
}
template <class T> struct to_python_value;
struct reference_existing_object
{
template <class T>
struct apply
{
BOOST_STATIC_CONSTANT(
bool, ok = detail::is_pointer<T>::value || detail::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
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