boost/python
2
0
Fork 0
mirror of https://github.com/boostorg/python.git synced 2026-01-30 20:12:37 +00:00
Code Issues Projects Releases Wiki Activity

Improved None <==> NULL correspondence

Browse Source 
[SVN r13155]
This commit is contained in:
Dave Abrahams
2002-03-10 06:25:09 +00:00
parent 74078552df
commit ae1c1b3a47
1 changed files with 20 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
include/boost/python/to_python_indirect.hpp
View File

@@ -67,6 +67,22 @@ namespace detail
return python::objects::class_object<T>::reference;
}
};
// null_pointer_to_none -- return none() for null pointers and 0 for all other types/values
//
// Uses simulated partial ordering
template <class T>
inline PyObject* null_pointer_to_none(T&, int)
{
return 0;
}
// overload for pointers
template <class T>
inline PyObject* null_pointer_to_none(T* x, long)
{
return x == 0 ? python::detail::none() : 0;
}
}
template <class T, class MakeHolder>
@@ -79,6 +95,10 @@ inline bool to_python_indirect<T,MakeHolder>::convertible()
template <class T, class MakeHolder>
inline PyObject* to_python_indirect<T,MakeHolder>::operator()(T x) const
{
PyObject* const null_result = detail::null_pointer_to_none(x, 1L);
if (null_result != 0)
return null_result;
PyObject* raw_result = type()->tp_alloc(type(), 0);
if (raw_result == 0)