122 lines
3.8 KiB
Plaintext
122 lines
3.8 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 OBJ_MGR_ARG_FROM_PYTHON_DWA2002628_HPP
|
|
# define OBJ_MGR_ARG_FROM_PYTHON_DWA2002628_HPP
|
|
|
|
# include <boost/python/detail/prefix.hpp>
|
|
# include <boost/python/detail/referent_storage.hpp>
|
|
# include <boost/python/detail/destroy.hpp>
|
|
# include <boost/python/detail/construct.hpp>
|
|
# include <boost/python/converter/object_manager.hpp>
|
|
# include <boost/python/detail/raw_pyobject.hpp>
|
|
# include <boost/python/tag.hpp>
|
|
|
|
//
|
|
// arg_from_python converters for Python type wrappers, to be used as
|
|
// base classes for specializations.
|
|
//
|
|
namespace boost { namespace python { namespace converter {
|
|
|
|
template <class T>
|
|
struct object_manager_value_arg_from_python
|
|
{
|
|
typedef T result_type;
|
|
|
|
object_manager_value_arg_from_python(PyObject*);
|
|
bool convertible() const;
|
|
T operator()() const;
|
|
private:
|
|
PyObject* m_source;
|
|
};
|
|
|
|
// Used for converting reference-to-object-manager arguments from
|
|
// python. The process used here is a little bit odd. Upon
|
|
// construction, we build the object manager object in the m_result
|
|
// object, *forcing* it to accept the source Python object by casting
|
|
// its pointer to detail::borrowed_reference. This is supposed to
|
|
// bypass any type checking of the source object. The convertible
|
|
// check then extracts the owned object and checks it. If the check
|
|
// fails, nothing else in the program ever gets to touch this strange
|
|
// "forced" object.
|
|
template <class Ref>
|
|
struct object_manager_ref_arg_from_python
|
|
{
|
|
typedef Ref result_type;
|
|
|
|
object_manager_ref_arg_from_python(PyObject*);
|
|
bool convertible() const;
|
|
Ref operator()() const;
|
|
~object_manager_ref_arg_from_python();
|
|
private:
|
|
typename python::detail::referent_storage<Ref>::type m_result;
|
|
};
|
|
|
|
//
|
|
// implementations
|
|
//
|
|
|
|
template <class T>
|
|
inline object_manager_value_arg_from_python<T>::object_manager_value_arg_from_python(PyObject* x)
|
|
: m_source(x)
|
|
{
|
|
}
|
|
|
|
template <class T>
|
|
inline bool object_manager_value_arg_from_python<T>::convertible() const
|
|
{
|
|
return object_manager_traits<T>::check(m_source);
|
|
}
|
|
|
|
template <class T>
|
|
inline T object_manager_value_arg_from_python<T>::operator()() const
|
|
{
|
|
return T(python::detail::borrowed_reference(m_source));
|
|
}
|
|
|
|
template <class Ref>
|
|
inline object_manager_ref_arg_from_python<Ref>::object_manager_ref_arg_from_python(PyObject* x)
|
|
{
|
|
# if defined(__EDG_VERSION__) && __EDG_VERSION__ <= 243
|
|
// needed for warning suppression
|
|
python::detail::borrowed_reference x_ = python::detail::borrowed_reference(x);
|
|
python::detail::construct_referent<Ref>(&m_result.bytes, x_);
|
|
# else
|
|
python::detail::construct_referent<Ref>(&m_result.bytes, (python::detail::borrowed_reference)x);
|
|
# endif
|
|
}
|
|
|
|
template <class Ref>
|
|
inline object_manager_ref_arg_from_python<Ref>::~object_manager_ref_arg_from_python()
|
|
{
|
|
python::detail::destroy_referent<Ref>(this->m_result.bytes);
|
|
}
|
|
|
|
namespace detail
|
|
{
|
|
template <class T>
|
|
inline bool object_manager_ref_check(T const& x)
|
|
{
|
|
return object_manager_traits<T>::check(get_managed_object(x, tag));
|
|
}
|
|
}
|
|
|
|
template <class Ref>
|
|
inline bool object_manager_ref_arg_from_python<Ref>::convertible() const
|
|
{
|
|
return detail::object_manager_ref_check(
|
|
python::detail::void_ptr_to_reference(this->m_result.bytes, (Ref(*)())0));
|
|
}
|
|
|
|
template <class Ref>
|
|
inline Ref object_manager_ref_arg_from_python<Ref>::operator()() const
|
|
{
|
|
return python::detail::void_ptr_to_reference(
|
|
this->m_result.bytes, (Ref(*)())0);
|
|
}
|
|
|
|
}}} // namespace boost::python::converter
|
|
|
|
#endif // OBJ_MGR_ARG_FROM_PYTHON_DWA2002628_HPP
|