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