| #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 |