Fix T86332: Error using lambda in annotations in Python 3.10

Callbacks used in `bpy.props` didn't hold a references to the functions
they used.

While this has been the case since early 2.5x it didn't cause any
problems as long as the class held a reference.

With Python 3.10 or when using `from __future__ import annotations`,
the annotations are no longer owned by the class once evaluated.

Resolve this by holding a reference in the module, which now supports
traverse & clear callbacks so the objects are visible to Python's
garbage collector.

Also refactor storage of Python data, moving from an array into a struct.

1 files changed, 0 insertions, 9 deletions

diff --git a/source/blender/makesrna/intern/rna_access.c b/source/blender/makesrna/intern/rna_access.c
index 8e5e70642cc..f94dc38ddfe 100644
--- a/source/blender/makesrna/intern/rna_access.c
+++ b/source/blender/makesrna/intern/rna_access.c
@@ -3598,15 +3598,6 @@ int RNA_property_enum_get_default(PointerRNA *UNUSED(ptr), PropertyRNA *prop)
   return eprop->defaultvalue;
 }
 
-void *RNA_property_enum_py_data_get(PropertyRNA *prop)
-{
-  EnumPropertyRNA *eprop = (EnumPropertyRNA *)prop;
-
-  BLI_assert(RNA_property_type(prop) == PROP_ENUM);
-
-  return eprop->py_data;
-}
-
 /**
  * Get the value of the item that is \a step items away from \a from_value.
  *