262 lines
7.3 KiB
C++
262 lines
7.3 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 ARG_TO_PYTHON_DWA200265_HPP
|
|
# define ARG_TO_PYTHON_DWA200265_HPP
|
|
|
|
# include <boost/python/ptr.hpp>
|
|
# include <boost/python/tag.hpp>
|
|
# include <boost/python/to_python_indirect.hpp>
|
|
|
|
# include <boost/python/converter/registered.hpp>
|
|
# include <boost/python/converter/registered_pointee.hpp>
|
|
# include <boost/python/converter/arg_to_python_base.hpp>
|
|
# include <boost/python/converter/shared_ptr_to_python.hpp>
|
|
// Bring in specializations
|
|
# include <boost/python/converter/builtin_converters.hpp>
|
|
|
|
# include <boost/python/object/function_handle.hpp>
|
|
|
|
# include <boost/python/base_type_traits.hpp>
|
|
|
|
# include <boost/python/detail/indirect_traits.hpp>
|
|
# include <boost/python/detail/convertible.hpp>
|
|
# include <boost/python/detail/string_literal.hpp>
|
|
# include <boost/python/detail/value_is_shared_ptr.hpp>
|
|
|
|
# include <boost/type_traits/cv_traits.hpp>
|
|
# include <boost/type_traits/composite_traits.hpp>
|
|
# include <boost/type_traits/function_traits.hpp>
|
|
|
|
|
|
# include <boost/mpl/or.hpp>
|
|
|
|
namespace boost { namespace python { namespace converter {
|
|
|
|
template <class T> struct is_object_manager;
|
|
|
|
namespace detail
|
|
{
|
|
template <class T>
|
|
struct function_arg_to_python : handle<>
|
|
{
|
|
function_arg_to_python(T const& x);
|
|
};
|
|
|
|
template <class T>
|
|
struct reference_arg_to_python : handle<>
|
|
{
|
|
reference_arg_to_python(T& x);
|
|
private:
|
|
static PyObject* get_object(T& x);
|
|
};
|
|
|
|
template <class T>
|
|
struct shared_ptr_arg_to_python : handle<>
|
|
{
|
|
shared_ptr_arg_to_python(T const& x);
|
|
private:
|
|
static PyObject* get_object(T& x);
|
|
};
|
|
|
|
template <class T>
|
|
struct value_arg_to_python : arg_to_python_base
|
|
{
|
|
// Throw an exception if the conversion can't succeed
|
|
value_arg_to_python(T const&);
|
|
};
|
|
|
|
template <class Ptr>
|
|
struct pointer_deep_arg_to_python : arg_to_python_base
|
|
{
|
|
// Throw an exception if the conversion can't succeed
|
|
pointer_deep_arg_to_python(Ptr);
|
|
};
|
|
|
|
template <class Ptr>
|
|
struct pointer_shallow_arg_to_python : handle<>
|
|
{
|
|
// Throw an exception if the conversion can't succeed
|
|
pointer_shallow_arg_to_python(Ptr);
|
|
private:
|
|
static PyObject* get_object(Ptr p);
|
|
};
|
|
|
|
// Convert types that manage a Python object to_python
|
|
template <class T>
|
|
struct object_manager_arg_to_python
|
|
{
|
|
object_manager_arg_to_python(T const& x) : m_src(x) {}
|
|
|
|
PyObject* get() const
|
|
{
|
|
return python::upcast<PyObject>(get_managed_object(m_src, tag));
|
|
}
|
|
|
|
private:
|
|
T const& m_src;
|
|
};
|
|
|
|
template <class T>
|
|
struct select_arg_to_python
|
|
{
|
|
typedef typename unwrap_reference<T>::type unwrapped_referent;
|
|
typedef typename unwrap_pointer<T>::type unwrapped_ptr;
|
|
|
|
typedef typename mpl::if_<
|
|
// Special handling for char const[N]; interpret them as char
|
|
// const* for the sake of conversion
|
|
python::detail::is_string_literal<T const>
|
|
, arg_to_python<char const*>
|
|
|
|
, typename mpl::if_<
|
|
python::detail::value_is_shared_ptr<T>
|
|
, shared_ptr_arg_to_python<T>
|
|
|
|
, typename mpl::if_<
|
|
mpl::or_<
|
|
is_function<T>
|
|
, indirect_traits::is_pointer_to_function<T>
|
|
, is_member_function_pointer<T>
|
|
>
|
|
, function_arg_to_python<T>
|
|
|
|
, typename mpl::if_<
|
|
is_object_manager<T>
|
|
, object_manager_arg_to_python<T>
|
|
|
|
, typename mpl::if_<
|
|
is_pointer<T>
|
|
, pointer_deep_arg_to_python<T>
|
|
|
|
, typename mpl::if_<
|
|
is_pointer_wrapper<T>
|
|
, pointer_shallow_arg_to_python<unwrapped_ptr>
|
|
|
|
, typename mpl::if_<
|
|
is_reference_wrapper<T>
|
|
, reference_arg_to_python<unwrapped_referent>
|
|
, value_arg_to_python<T>
|
|
>::type
|
|
>::type
|
|
>::type
|
|
>::type
|
|
>::type
|
|
>::type
|
|
>::type
|
|
|
|
type;
|
|
};
|
|
}
|
|
|
|
template <class T>
|
|
struct arg_to_python
|
|
: detail::select_arg_to_python<T>::type
|
|
{
|
|
typedef typename detail::select_arg_to_python<T>::type base;
|
|
public: // member functions
|
|
// Throw an exception if the conversion can't succeed
|
|
arg_to_python(T const& x);
|
|
};
|
|
|
|
//
|
|
// implementations
|
|
//
|
|
namespace detail
|
|
{
|
|
// reject_raw_object_ptr -- cause a compile-time error if the user
|
|
// should pass a raw Python object pointer
|
|
using python::detail::yes_convertible;
|
|
using python::detail::no_convertible;
|
|
using python::detail::unspecialized;
|
|
|
|
template <class T> struct cannot_convert_raw_PyObject;
|
|
|
|
template <class T, class Convertibility>
|
|
struct reject_raw_object_helper
|
|
{
|
|
static void error(Convertibility)
|
|
{
|
|
cannot_convert_raw_PyObject<T*>::to_python_use_handle_instead();
|
|
}
|
|
static void error(...) {}
|
|
};
|
|
|
|
template <class T>
|
|
inline void reject_raw_object_ptr(T*)
|
|
{
|
|
reject_raw_object_helper<T,yes_convertible>::error(
|
|
python::detail::convertible<PyObject const volatile*>::check((T*)0));
|
|
|
|
typedef typename remove_cv<T>::type value_type;
|
|
|
|
reject_raw_object_helper<T,no_convertible>::error(
|
|
python::detail::convertible<unspecialized*>::check(
|
|
(base_type_traits<value_type>*)0
|
|
));
|
|
}
|
|
// ---------
|
|
|
|
template <class T>
|
|
inline function_arg_to_python<T>::function_arg_to_python(T const& x)
|
|
: handle<>(python::objects::make_function_handle(x))
|
|
{
|
|
}
|
|
|
|
template <class T>
|
|
inline value_arg_to_python<T>::value_arg_to_python(T const& x)
|
|
: arg_to_python_base(&x, registered<T>::converters)
|
|
{
|
|
}
|
|
|
|
template <class Ptr>
|
|
inline pointer_deep_arg_to_python<Ptr>::pointer_deep_arg_to_python(Ptr x)
|
|
: arg_to_python_base(x, registered_pointee<Ptr>::converters)
|
|
{
|
|
detail::reject_raw_object_ptr((Ptr)0);
|
|
}
|
|
|
|
template <class T>
|
|
inline PyObject* reference_arg_to_python<T>::get_object(T& x)
|
|
{
|
|
to_python_indirect<T&,python::detail::make_reference_holder> convert;
|
|
return convert(x);
|
|
}
|
|
|
|
template <class T>
|
|
inline reference_arg_to_python<T>::reference_arg_to_python(T& x)
|
|
: handle<>(reference_arg_to_python<T>::get_object(x))
|
|
{
|
|
}
|
|
|
|
template <class T>
|
|
inline shared_ptr_arg_to_python<T>::shared_ptr_arg_to_python(T const& x)
|
|
: handle<>(shared_ptr_to_python(x))
|
|
{
|
|
}
|
|
|
|
template <class Ptr>
|
|
inline pointer_shallow_arg_to_python<Ptr>::pointer_shallow_arg_to_python(Ptr x)
|
|
: handle<>(pointer_shallow_arg_to_python<Ptr>::get_object(x))
|
|
{
|
|
detail::reject_raw_object_ptr((Ptr)0);
|
|
}
|
|
|
|
template <class Ptr>
|
|
inline PyObject* pointer_shallow_arg_to_python<Ptr>::get_object(Ptr x)
|
|
{
|
|
to_python_indirect<Ptr,python::detail::make_reference_holder> convert;
|
|
return convert(x);
|
|
}
|
|
}
|
|
|
|
template <class T>
|
|
inline arg_to_python<T>::arg_to_python(T const& x)
|
|
: base(x)
|
|
{}
|
|
|
|
}}} // namespace boost::python::converter
|
|
|
|
#endif // ARG_TO_PYTHON_DWA200265_HPP
|