92 lines
2.3 KiB
C++
92 lines
2.3 KiB
C++
|
// 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 DEFAULT_CALL_POLICIES_DWA2002131_HPP
|
||
|
|
# define DEFAULT_CALL_POLICIES_DWA2002131_HPP
|
||
|
|
|
||
|
|
# include <boost/python/detail/prefix.hpp>
|
||
|
|
# include <boost/mpl/if.hpp>
|
||
|
|
# include <boost/python/to_python_value.hpp>
|
||
|
|
# include <boost/python/detail/value_arg.hpp>
|
||
|
|
# include <boost/type_traits/transform_traits.hpp>
|
||
|
|
# include <boost/type_traits/is_pointer.hpp>
|
||
|
|
# include <boost/type_traits/is_reference.hpp>
|
||
|
|
# include <boost/mpl/or.hpp>
|
||
|
|
# include <boost/mpl/front.hpp>
|
||
|
|
|
||
|
|
namespace boost { namespace python {
|
||
|
|
|
||
|
|
template <class T> struct to_python_value;
|
||
|
|
|
||
|
|
namespace detail
|
||
|
|
{
|
||
|
|
// for "readable" error messages
|
||
|
|
template <class T> struct specify_a_return_value_policy_to_wrap_functions_returning
|
||
|
|
# if defined(__GNUC__) && __GNUC__ >= 3 || defined(__EDG__)
|
||
|
|
{}
|
||
|
|
# endif
|
||
|
|
;
|
||
|
|
}
|
||
|
|
|
||
|
|
struct default_result_converter;
|
||
|
|
|
||
|
|
struct default_call_policies
|
||
|
|
{
|
||
|
|
// Ownership of this argument tuple will ultimately be adopted by
|
||
|
|
// the caller.
|
||
|
|
template <class ArgumentPackage>
|
||
|
|
static bool precall(ArgumentPackage const&)
|
||
|
|
{
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Pass the result through
|
||
|
|
template <class ArgumentPackage>
|
||
|
|
static PyObject* postcall(ArgumentPackage const&, PyObject* result)
|
||
|
|
{
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
typedef default_result_converter result_converter;
|
||
|
|
typedef PyObject* argument_package;
|
||
|
|
|
||
|
|
template <class Sig>
|
||
|
|
struct extract_return_type : mpl::front<Sig>
|
||
|
|
{
|
||
|
|
};
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
struct default_result_converter
|
||
|
|
{
|
||
|
|
template <class R>
|
||
|
|
struct apply
|
||
|
|
{
|
||
|
|
typedef typename mpl::if_<
|
||
|
|
mpl::or_<is_pointer<R>, is_reference<R> >
|
||
|
|
, detail::specify_a_return_value_policy_to_wrap_functions_returning<R>
|
||
|
|
, boost::python::to_python_value<
|
||
|
|
typename detail::value_arg<R>::type
|
||
|
|
>
|
||
|
|
>::type type;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
// Exceptions for c strings an PyObject*s
|
||
|
|
template <>
|
||
|
|
struct default_result_converter::apply<char const*>
|
||
|
|
{
|
||
|
|
typedef boost::python::to_python_value<char const*const&> type;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <>
|
||
|
|
struct default_result_converter::apply<PyObject*>
|
||
|
|
{
|
||
|
|
typedef boost::python::to_python_value<PyObject*const&> type;
|
||
|
|
};
|
||
|
|
|
||
|
|
}} // namespace boost::python
|
||
|
|
|
||
|
|
#endif // DEFAULT_CALL_POLICIES_DWA2002131_HPP
|