Function pyrna_struct_CreatePyObject

source/blender/python/intern/bpy_rna.cc:8623–8657

}

PyObject *pyrna_struct_CreatePyObject(PointerRNA *ptr)
{
  /* NOTE: don't rely on this to return None since nullptr data with a valid type can often crash.
   */
  if (ptr->data == nullptr && ptr->type == nullptr) { /* Operator RNA has nullptr data. */
    Py_RETURN_NONE;
  }

  BPy_StructRNA *pyrna = nullptr;

  /* NOTE(@ideasman42): New in 2.8x, since not many types support instancing
   * we may want to use a flag to avoid looping over all classes. */
  void **instance = ptr->data ? RNA_struct_instance(ptr) : nullptr;
  if (instance && *instance) {
    pyrna = static_cast<BPy_StructRNA *>(*instance);

    /* Refine may have changed types after the first instance was created. */
    if (ptr->type == pyrna->ptr->type) {
      Py_INCREF(pyrna);
      return reinterpret_cast<PyObject *>(pyrna);
    }

    /* Existing users will need to use 'type_recast' method. */
    Py_DECREF(pyrna);
    *instance = nullptr;
    /* Continue as if no instance was available. */
  }

  PyTypeObject *tp = reinterpret_cast<PyTypeObject *>(pyrna_struct_Subtype(ptr));
  pyrna = reinterpret_cast<BPy_StructRNA *>(
      pyrna_struct_CreatePyObject_from_type(ptr, tp, instance));
  Py_XDECREF(tp); /* `srna` owns, can't hold a reference. */

  return reinterpret_cast<PyObject *>(pyrna);
}

PyObject *pyrna_struct_CreatePyObject_with_primitive_support(PointerRNA *ptr)
{