44 lines
1.3 KiB
Plaintext
44 lines
1.3 KiB
Plaintext
// 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 RETURN_INTERNAL_REFERENCE_DWA2002131_HPP
|
|
# define RETURN_INTERNAL_REFERENCE_DWA2002131_HPP
|
|
|
|
# include <boost/python/detail/prefix.hpp>
|
|
|
|
# include <boost/python/default_call_policies.hpp>
|
|
# include <boost/python/reference_existing_object.hpp>
|
|
# include <boost/python/with_custodian_and_ward.hpp>
|
|
# include <boost/mpl/if.hpp>
|
|
|
|
namespace boost { namespace python {
|
|
|
|
namespace detail
|
|
{
|
|
template <std::size_t>
|
|
struct return_internal_reference_owner_arg_must_be_greater_than_zero
|
|
# if defined(__GNUC__) || defined(__EDG__)
|
|
{}
|
|
# endif
|
|
;
|
|
}
|
|
|
|
template <std::size_t owner_arg = 1, class BasePolicy_ = default_call_policies>
|
|
struct return_internal_reference
|
|
: with_custodian_and_ward_postcall<0, owner_arg, BasePolicy_>
|
|
{
|
|
private:
|
|
BOOST_STATIC_CONSTANT(bool, legal = owner_arg > 0);
|
|
public:
|
|
typedef typename mpl::if_c<
|
|
legal
|
|
, reference_existing_object
|
|
, detail::return_internal_reference_owner_arg_must_be_greater_than_zero<owner_arg>
|
|
>::type result_converter;
|
|
};
|
|
|
|
}} // namespace boost::python
|
|
|
|
#endif // RETURN_INTERNAL_REFERENCE_DWA2002131_HPP
|