#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 VALUE_HOLDER_DWA20011215_HPP | |
# define VALUE_HOLDER_DWA20011215_HPP | |
# include <boost/python/object/value_holder_fwd.hpp> | |
# include <boost/python/instance_holder.hpp> | |
# include <boost/python/type_id.hpp> | |
# include <boost/python/wrapper.hpp> | |
# include <boost/python/object/inheritance_query.hpp> | |
# include <boost/python/object/forward.hpp> | |
# include <boost/python/detail/force_instantiate.hpp> | |
# include <boost/python/detail/preprocessor.hpp> | |
# include <boost/preprocessor/comma_if.hpp> | |
# include <boost/preprocessor/enum_params.hpp> | |
# include <boost/preprocessor/iterate.hpp> | |
# include <boost/preprocessor/repeat.hpp> | |
# include <boost/preprocessor/debug/line.hpp> | |
# include <boost/preprocessor/repetition/enum_params.hpp> | |
# include <boost/preprocessor/repetition/enum_binary_params.hpp> | |
# include <boost/utility/addressof.hpp> | |
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 Value> | |
struct value_holder : instance_holder | |
{ | |
typedef Value held_type; | |
typedef Value value_type; | |
// Forward construction to the held object | |
# define BOOST_PP_ITERATION_PARAMS_1 (4, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/object/value_holder.hpp>, 1)) | |
# include BOOST_PP_ITERATE() | |
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 | |
Value m_held; | |
}; | |
template <class Value, class Held> | |
struct value_holder_back_reference : instance_holder | |
{ | |
typedef Held held_type; | |
typedef Value value_type; | |
// Forward construction to the held object | |
# define BOOST_PP_ITERATION_PARAMS_1 (4, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/object/value_holder.hpp>, 2)) | |
# include BOOST_PP_ITERATE() | |
private: // required holder implementation | |
void* holds(type_info, bool null_ptr_only); | |
private: // data members | |
Held m_held; | |
}; | |
# undef BOOST_PYTHON_UNFORWARD_LOCAL | |
template <class Value> | |
void* value_holder<Value>::holds(type_info dst_t, bool /*null_ptr_only*/) | |
{ | |
if (void* wrapped = holds_wrapped(dst_t, boost::addressof(m_held), boost::addressof(m_held))) | |
return wrapped; | |
type_info src_t = python::type_id<Value>(); | |
return src_t == dst_t ? boost::addressof(m_held) | |
: find_static_type(boost::addressof(m_held), src_t, dst_t); | |
} | |
template <class Value, class Held> | |
void* value_holder_back_reference<Value,Held>::holds( | |
type_info dst_t, bool /*null_ptr_only*/) | |
{ | |
type_info src_t = python::type_id<Value>(); | |
Value* x = &m_held; | |
if (dst_t == src_t) | |
return x; | |
else if (dst_t == python::type_id<Held>()) | |
return &m_held; | |
else | |
return find_static_type(x, src_t, dst_t); | |
} | |
}}} // namespace boost::python::objects | |
# endif // VALUE_HOLDER_DWA20011215_HPP | |
// --------------- value_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__, value_holder.hpp(value_holder)) | |
# endif | |
# define N BOOST_PP_ITERATION() | |
# if (N != 0) | |
template <BOOST_PP_ENUM_PARAMS_Z(1, N, class A)> | |
# endif | |
value_holder( | |
PyObject* self BOOST_PP_COMMA_IF(N) BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, A, a)) | |
: m_held( | |
BOOST_PP_REPEAT_1ST(N, BOOST_PYTHON_UNFORWARD_LOCAL, nil) | |
) | |
{ | |
python::detail::initialize_wrapper(self, boost::addressof(this->m_held)); | |
} | |
# undef N | |
// --------------- value_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__, value_holder.hpp(value_holder_back_reference)) | |
# endif | |
# define N BOOST_PP_ITERATION() | |
# if (N != 0) | |
template <BOOST_PP_ENUM_PARAMS_Z(1, N, class A)> | |
# endif | |
value_holder_back_reference( | |
PyObject* p BOOST_PP_COMMA_IF(N) BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, A, a)) | |
: m_held( | |
p BOOST_PP_COMMA_IF(N) | |
BOOST_PP_REPEAT_1ST(N, BOOST_PYTHON_UNFORWARD_LOCAL, nil) | |
) | |
{ | |
} | |
# undef N | |
#endif // BOOST_PP_ITERATION_DEPTH() | |
#endif |