225 lines
6.4 KiB
C++
225 lines
6.4 KiB
C++
#if !defined(BOOST_PP_IS_ITERATING)
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// Copyright David Abrahams 2001.
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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# ifndef POINTER_HOLDER_DWA20011215_HPP
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# define POINTER_HOLDER_DWA20011215_HPP
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# include <boost/get_pointer.hpp>
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# include <boost/type.hpp>
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# include <boost/python/instance_holder.hpp>
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# include <boost/python/object/inheritance_query.hpp>
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# include <boost/python/object/forward.hpp>
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# include <boost/python/pointee.hpp>
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# include <boost/python/type_id.hpp>
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# include <boost/python/detail/wrapper_base.hpp>
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# include <boost/python/detail/force_instantiate.hpp>
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# include <boost/python/detail/preprocessor.hpp>
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# include <boost/mpl/if.hpp>
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# include <boost/mpl/apply.hpp>
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# include <boost/preprocessor/comma_if.hpp>
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# include <boost/preprocessor/iterate.hpp>
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# include <boost/preprocessor/repeat.hpp>
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# include <boost/preprocessor/debug/line.hpp>
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# include <boost/preprocessor/enum_params.hpp>
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# include <boost/preprocessor/repetition/enum_binary_params.hpp>
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# include <boost/detail/workaround.hpp>
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# include <boost/type_traits/remove_const.hpp>
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namespace boost { namespace python {
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template <class T> class wrapper;
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}}
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namespace boost { namespace python { namespace objects {
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# if BOOST_WORKAROUND(__GNUC__, == 2)
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# define BOOST_PYTHON_UNFORWARD_LOCAL(z, n, _) BOOST_PP_COMMA_IF(n) (typename unforward<A##n>::type)objects::do_unforward(a##n,0)
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# else
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# define BOOST_PYTHON_UNFORWARD_LOCAL(z, n, _) BOOST_PP_COMMA_IF(n) objects::do_unforward(a##n,0)
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# endif
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template <class Pointer, class Value>
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struct pointer_holder : instance_holder
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{
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typedef Value value_type;
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pointer_holder(Pointer);
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// Forward construction to the held object
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# define BOOST_PP_ITERATION_PARAMS_1 (4, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/object/pointer_holder.hpp>, 1))
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# include BOOST_PP_ITERATE()
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private: // types
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private: // required holder implementation
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void* holds(type_info, bool null_ptr_only);
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template <class T>
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inline void* holds_wrapped(type_info dst_t, wrapper<T>*,T* p)
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{
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return python::type_id<T>() == dst_t ? p : 0;
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}
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inline void* holds_wrapped(type_info, ...)
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{
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return 0;
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}
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private: // data members
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Pointer m_p;
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};
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template <class Pointer, class Value>
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struct pointer_holder_back_reference : instance_holder
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{
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private:
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typedef typename python::pointee<Pointer>::type held_type;
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public:
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typedef Value value_type;
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// Not sure about this one -- can it work? The source object
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// undoubtedly does not carry the correct back reference pointer.
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pointer_holder_back_reference(Pointer);
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// Forward construction to the held object
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# define BOOST_PP_ITERATION_PARAMS_1 (4, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/object/pointer_holder.hpp>, 2))
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# include BOOST_PP_ITERATE()
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private: // required holder implementation
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void* holds(type_info, bool null_ptr_only);
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private: // data members
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Pointer m_p;
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};
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# undef BOOST_PYTHON_UNFORWARD_LOCAL
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template <class Pointer, class Value>
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inline pointer_holder<Pointer,Value>::pointer_holder(Pointer p)
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: m_p(p)
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{
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}
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template <class Pointer, class Value>
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inline pointer_holder_back_reference<Pointer,Value>::pointer_holder_back_reference(Pointer p)
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: m_p(p)
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{
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}
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template <class Pointer, class Value>
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void* pointer_holder<Pointer, Value>::holds(type_info dst_t, bool null_ptr_only)
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{
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typedef typename boost::remove_const< Value >::type non_const_value;
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if (dst_t == python::type_id<Pointer>()
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&& !(null_ptr_only && get_pointer(this->m_p))
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)
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return &this->m_p;
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Value* p0
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# if BOOST_WORKAROUND(__SUNPRO_CC, BOOST_TESTED_AT(0x590))
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= static_cast<Value*>( get_pointer(this->m_p) )
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# else
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= get_pointer(this->m_p)
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# endif
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;
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non_const_value* p = const_cast<non_const_value*>( p0 );
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if (p == 0)
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return 0;
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if (void* wrapped = holds_wrapped(dst_t, p, p))
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return wrapped;
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type_info src_t = python::type_id<non_const_value>();
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return src_t == dst_t ? p : find_dynamic_type(p, src_t, dst_t);
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}
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template <class Pointer, class Value>
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void* pointer_holder_back_reference<Pointer, Value>::holds(type_info dst_t, bool null_ptr_only)
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{
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if (dst_t == python::type_id<Pointer>()
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&& !(null_ptr_only && get_pointer(this->m_p))
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)
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return &this->m_p;
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if (!get_pointer(this->m_p))
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return 0;
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Value* p = get_pointer(m_p);
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if (dst_t == python::type_id<held_type>())
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return p;
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type_info src_t = python::type_id<Value>();
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return src_t == dst_t ? p : find_dynamic_type(p, src_t, dst_t);
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}
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}}} // namespace boost::python::objects
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# endif // POINTER_HOLDER_DWA20011215_HPP
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/* --------------- pointer_holder --------------- */
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// For gcc 4.4 compatability, we must include the
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// BOOST_PP_ITERATION_DEPTH test inside an #else clause.
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#else // BOOST_PP_IS_ITERATING
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#if BOOST_PP_ITERATION_DEPTH() == 1 && BOOST_PP_ITERATION_FLAGS() == 1
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# if !(BOOST_WORKAROUND(__MWERKS__, > 0x3100) \
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&& BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3201)))
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# line BOOST_PP_LINE(__LINE__, pointer_holder.hpp)
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# endif
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# define N BOOST_PP_ITERATION()
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# if (N != 0)
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template< BOOST_PP_ENUM_PARAMS_Z(1, N, class A) >
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# endif
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pointer_holder(PyObject* self BOOST_PP_COMMA_IF(N) BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, A, a))
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: m_p(new Value(
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BOOST_PP_REPEAT_1ST(N, BOOST_PYTHON_UNFORWARD_LOCAL, nil)
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))
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{
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python::detail::initialize_wrapper(self, get_pointer(this->m_p));
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}
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# undef N
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/* --------------- pointer_holder_back_reference --------------- */
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#elif BOOST_PP_ITERATION_DEPTH() == 1 && BOOST_PP_ITERATION_FLAGS() == 2
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# if !(BOOST_WORKAROUND(__MWERKS__, > 0x3100) \
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&& BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3201)))
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# line BOOST_PP_LINE(__LINE__, pointer_holder.hpp(pointer_holder_back_reference))
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# endif
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# define N BOOST_PP_ITERATION()
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# if (N != 0)
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template < BOOST_PP_ENUM_PARAMS_Z(1, N, class A) >
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# endif
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pointer_holder_back_reference(
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PyObject* p BOOST_PP_COMMA_IF(N) BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, A, a))
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: m_p(new held_type(
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p BOOST_PP_COMMA_IF(N) BOOST_PP_REPEAT_1ST(N, BOOST_PYTHON_UNFORWARD_LOCAL, nil)
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))
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{}
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# undef N
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#endif // BOOST_PP_ITERATION_DEPTH()
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#endif
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