[GitHub] [arrow] cyb70289 commented on a change in pull request #9274: ARROW-11299: [Python] Fix invalid-offsetof warnings

[GitBox <gi...@apache.org>]

cyb70289 commented on a change in pull request #9274:
URL: https://github.com/apache/arrow/pull/9274#discussion_r562483502



##########
File path: python/pyarrow/_compute.pyx
##########
@@ -481,88 +481,89 @@ cdef class FunctionOptions(_Weakrefable):
 
 cdef class _CastOptions(FunctionOptions):
     cdef:
-        CCastOptions options
+        unique_ptr[CCastOptions] options
 
     __slots__ = ()  # avoid mistakingly creating attributes
 
     cdef const CFunctionOptions* get_options(self) except NULL:
-        return &self.options
+        return self.options.get()
 
     def _set_options(self, DataType target_type, allow_int_overflow,
                      allow_time_truncate, allow_time_overflow,
                      allow_float_truncate, allow_invalid_utf8):
+        self.options.reset(new CCastOptions())
         self._set_type(target_type)
         if allow_int_overflow is not None:
-            self.allow_int_overflow = allow_int_overflow
+            deref(self.options).allow_int_overflow = allow_int_overflow
         if allow_time_truncate is not None:
-            self.allow_time_truncate = allow_time_truncate
+            deref(self.options).allow_time_truncate = allow_time_truncate
         if allow_time_overflow is not None:
-            self.allow_time_overflow = allow_time_overflow
+            deref(self.options).allow_time_overflow = allow_time_overflow
         if allow_float_truncate is not None:
-            self.allow_float_truncate = allow_float_truncate
+            deref(self.options).allow_float_truncate = allow_float_truncate
         if allow_invalid_utf8 is not None:
-            self.allow_invalid_utf8 = allow_invalid_utf8
+            deref(self.options).allow_invalid_utf8 = allow_invalid_utf8
 
     def _set_type(self, target_type=None):
         if target_type is not None:
-            self.options.to_type = (
+            deref(self.options).to_type = (
                 (<DataType> ensure_type(target_type)).sp_type
             )
 
     def _set_safe(self):
-        self.options = CCastOptions.Safe()
+        self.options.reset(new CCastOptions(CCastOptions.Safe()))

Review comment:
       Any way to assign `self.options` directly?




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