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New-style polymorphism

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[SVN r24083]
This commit is contained in:
Dave Abrahams
2004-07-26 15:34:36 +00:00
parent 597342bf15
commit c8e8ccfa22
24 changed files with 957 additions and 294 deletions
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33
include/boost/python/object/pointer_holder.hpp
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@@ -12,13 +12,17 @@
# include <boost/type.hpp>
# include <boost/python/instance_holder.hpp>
# include <boost/python/type_id.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>
@@ -31,6 +35,13 @@
# include <boost/detail/workaround.hpp>
namespace boost { namespace python {
template <class T> class wrapper;
}}
namespace boost { namespace python { namespace objects {
# if BOOST_WORKAROUND(__GNUC__, == 2)
@@ -55,6 +66,17 @@ struct pointer_holder : instance_holder
private: // required holder implementation
void* holds(type_info);
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;
@@ -107,6 +129,9 @@ void* pointer_holder<Pointer, Value>::holds(type_info dst_t)
if (p == 0)
return 0;
if (void* wrapped = holds_wrapped(dst_t, p, p))
return wrapped;
type_info src_t = python::type_id<Value>();
return src_t == dst_t ? p : find_dynamic_type(p, src_t, dst_t);
}
@@ -145,11 +170,13 @@ void* pointer_holder_back_reference<Pointer, Value>::holds(type_info dst_t)
# if (N != 0)
template< BOOST_PP_ENUM_PARAMS_Z(1, N, class A) >
# endif
pointer_holder(PyObject* BOOST_PP_COMMA_IF(N) BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, A, a))
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, &*this->m_p);
}
# undef N