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91 lines
2.3 KiB
91 lines
2.3 KiB
// 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 DEFAULT_CALL_POLICIES_DWA2002131_HPP |
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# define DEFAULT_CALL_POLICIES_DWA2002131_HPP |
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# include <boost/python/detail/prefix.hpp> |
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# include <boost/mpl/if.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/type_traits/transform_traits.hpp> |
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# include <boost/type_traits/is_pointer.hpp> |
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# include <boost/type_traits/is_reference.hpp> |
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# include <boost/mpl/or.hpp> |
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# include <boost/mpl/front.hpp> |
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namespace boost { namespace python { |
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template <class T> struct to_python_value; |
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namespace detail |
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{ |
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// for "readable" error messages |
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template <class T> struct specify_a_return_value_policy_to_wrap_functions_returning |
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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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struct default_result_converter; |
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struct default_call_policies |
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{ |
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// Ownership of this argument tuple will ultimately be adopted by |
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// the caller. |
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template <class ArgumentPackage> |
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static bool precall(ArgumentPackage const&) |
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{ |
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return true; |
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} |
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// Pass the result through |
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template <class ArgumentPackage> |
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static PyObject* postcall(ArgumentPackage const&, PyObject* result) |
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{ |
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return result; |
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} |
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typedef default_result_converter result_converter; |
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typedef PyObject* argument_package; |
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template <class Sig> |
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struct extract_return_type : mpl::front<Sig> |
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{ |
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}; |
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}; |
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struct default_result_converter |
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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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typedef typename mpl::if_< |
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mpl::or_<is_pointer<R>, is_reference<R> > |
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, detail::specify_a_return_value_policy_to_wrap_functions_returning<R> |
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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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>::type type; |
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}; |
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}; |
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// Exceptions for c strings an PyObject*s |
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template <> |
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struct default_result_converter::apply<char const*> |
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{ |
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typedef boost::python::to_python_value<char const*const&> type; |
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}; |
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template <> |
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struct default_result_converter::apply<PyObject*> |
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{ |
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typedef boost::python::to_python_value<PyObject*const&> type; |
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}; |
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}} // namespace boost::python |
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#endif // DEFAULT_CALL_POLICIES_DWA2002131_HPP
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