#if !defined(BOOST_PP_IS_ITERATING) | |
// Copyright David Abrahams 2001. | |
// 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 POINTER_HOLDER_DWA20011215_HPP | |
# define POINTER_HOLDER_DWA20011215_HPP | |
# include <boost/get_pointer.hpp> | |
# include <boost/type.hpp> | |
# include <boost/python/instance_holder.hpp> | |
# include <boost/python/object/inheritance_query.hpp> | |
# include <boost/python/object/forward.hpp> | |
# include <boost/python/pointee.hpp> | |
# include <boost/python/type_id.hpp> | |
# include <boost/python/detail/wrapper_base.hpp> | |
# include <boost/python/detail/force_instantiate.hpp> | |
# include <boost/python/detail/preprocessor.hpp> | |
# include <boost/mpl/if.hpp> | |
# include <boost/mpl/apply.hpp> | |
# include <boost/preprocessor/comma_if.hpp> | |
# include <boost/preprocessor/iterate.hpp> | |
# include <boost/preprocessor/repeat.hpp> | |
# include <boost/preprocessor/debug/line.hpp> | |
# include <boost/preprocessor/enum_params.hpp> | |
# include <boost/preprocessor/repetition/enum_binary_params.hpp> | |
# include <boost/detail/workaround.hpp> | |
# include <boost/type_traits/remove_const.hpp> | |
namespace boost { namespace python { | |
template <class T> class wrapper; | |
}} | |
namespace boost { namespace python { namespace objects { | |
# if BOOST_WORKAROUND(__GNUC__, == 2) | |
# define BOOST_PYTHON_UNFORWARD_LOCAL(z, n, _) BOOST_PP_COMMA_IF(n) (typename unforward<A##n>::type)objects::do_unforward(a##n,0) | |
# else | |
# define BOOST_PYTHON_UNFORWARD_LOCAL(z, n, _) BOOST_PP_COMMA_IF(n) objects::do_unforward(a##n,0) | |
# endif | |
template <class Pointer, class Value> | |
struct pointer_holder : instance_holder | |
{ | |
typedef Value value_type; | |
pointer_holder(Pointer); | |
// Forward construction to the held object | |
# define BOOST_PP_ITERATION_PARAMS_1 (4, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/object/pointer_holder.hpp>, 1)) | |
# include BOOST_PP_ITERATE() | |
private: // types | |
private: // required holder implementation | |
void* holds(type_info, bool null_ptr_only); | |
template <class T> | |
inline void* holds_wrapped(type_info dst_t, wrapper<T>*,T* p) | |
{ | |
return python::type_id<T>() == dst_t ? p : 0; | |
} | |
inline void* holds_wrapped(type_info, ...) | |
{ | |
return 0; | |
} | |
private: // data members | |
Pointer m_p; | |
}; | |
template <class Pointer, class Value> | |
struct pointer_holder_back_reference : instance_holder | |
{ | |
private: | |
typedef typename python::pointee<Pointer>::type held_type; | |
public: | |
typedef Value value_type; | |
// Not sure about this one -- can it work? The source object | |
// undoubtedly does not carry the correct back reference pointer. | |
pointer_holder_back_reference(Pointer); | |
// Forward construction to the held object | |
# define BOOST_PP_ITERATION_PARAMS_1 (4, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/object/pointer_holder.hpp>, 2)) | |
# include BOOST_PP_ITERATE() | |
private: // required holder implementation | |
void* holds(type_info, bool null_ptr_only); | |
private: // data members | |
Pointer m_p; | |
}; | |
# undef BOOST_PYTHON_UNFORWARD_LOCAL | |
template <class Pointer, class Value> | |
inline pointer_holder<Pointer,Value>::pointer_holder(Pointer p) | |
: m_p(p) | |
{ | |
} | |
template <class Pointer, class Value> | |
inline pointer_holder_back_reference<Pointer,Value>::pointer_holder_back_reference(Pointer p) | |
: m_p(p) | |
{ | |
} | |
template <class Pointer, class Value> | |
void* pointer_holder<Pointer, Value>::holds(type_info dst_t, bool null_ptr_only) | |
{ | |
typedef typename boost::remove_const< Value >::type non_const_value; | |
if (dst_t == python::type_id<Pointer>() | |
&& !(null_ptr_only && get_pointer(this->m_p)) | |
) | |
return &this->m_p; | |
Value* p0 | |
# if BOOST_WORKAROUND(__SUNPRO_CC, BOOST_TESTED_AT(0x590)) | |
= static_cast<Value*>( get_pointer(this->m_p) ) | |
# else | |
= get_pointer(this->m_p) | |
# endif | |
; | |
non_const_value* p = const_cast<non_const_value*>( p0 ); | |
if (p == 0) | |
return 0; | |
if (void* wrapped = holds_wrapped(dst_t, p, p)) | |
return wrapped; | |
type_info src_t = python::type_id<non_const_value>(); | |
return src_t == dst_t ? p : find_dynamic_type(p, src_t, dst_t); | |
} | |
template <class Pointer, class Value> | |
void* pointer_holder_back_reference<Pointer, Value>::holds(type_info dst_t, bool null_ptr_only) | |
{ | |
if (dst_t == python::type_id<Pointer>() | |
&& !(null_ptr_only && get_pointer(this->m_p)) | |
) | |
return &this->m_p; | |
if (!get_pointer(this->m_p)) | |
return 0; | |
Value* p = get_pointer(m_p); | |
if (dst_t == python::type_id<held_type>()) | |
return p; | |
type_info src_t = python::type_id<Value>(); | |
return src_t == dst_t ? p : find_dynamic_type(p, src_t, dst_t); | |
} | |
}}} // namespace boost::python::objects | |
# endif // POINTER_HOLDER_DWA20011215_HPP | |
/* --------------- pointer_holder --------------- */ | |
// For gcc 4.4 compatability, we must include the | |
// BOOST_PP_ITERATION_DEPTH test inside an #else clause. | |
#else // BOOST_PP_IS_ITERATING | |
#if BOOST_PP_ITERATION_DEPTH() == 1 && BOOST_PP_ITERATION_FLAGS() == 1 | |
# if !(BOOST_WORKAROUND(__MWERKS__, > 0x3100) \ | |
&& BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3201))) | |
# line BOOST_PP_LINE(__LINE__, pointer_holder.hpp) | |
# endif | |
# define N BOOST_PP_ITERATION() | |
# if (N != 0) | |
template< BOOST_PP_ENUM_PARAMS_Z(1, N, class A) > | |
# endif | |
pointer_holder(PyObject* self BOOST_PP_COMMA_IF(N) BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, A, a)) | |
: m_p(new Value( | |
BOOST_PP_REPEAT_1ST(N, BOOST_PYTHON_UNFORWARD_LOCAL, nil) | |
)) | |
{ | |
python::detail::initialize_wrapper(self, get_pointer(this->m_p)); | |
} | |
# undef N | |
/* --------------- pointer_holder_back_reference --------------- */ | |
#elif BOOST_PP_ITERATION_DEPTH() == 1 && BOOST_PP_ITERATION_FLAGS() == 2 | |
# if !(BOOST_WORKAROUND(__MWERKS__, > 0x3100) \ | |
&& BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3201))) | |
# line BOOST_PP_LINE(__LINE__, pointer_holder.hpp(pointer_holder_back_reference)) | |
# endif | |
# define N BOOST_PP_ITERATION() | |
# if (N != 0) | |
template < BOOST_PP_ENUM_PARAMS_Z(1, N, class A) > | |
# endif | |
pointer_holder_back_reference( | |
PyObject* p BOOST_PP_COMMA_IF(N) BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, A, a)) | |
: m_p(new held_type( | |
p BOOST_PP_COMMA_IF(N) BOOST_PP_REPEAT_1ST(N, BOOST_PYTHON_UNFORWARD_LOCAL, nil) | |
)) | |
{} | |
# undef N | |
#endif // BOOST_PP_ITERATION_DEPTH() | |
#endif |