zeroshade commented on code in PR #40807:
URL: https://github.com/apache/arrow/pull/40807#discussion_r1553855438


##########
cpp/src/arrow/c/bridge.cc:
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@@ -2041,6 +2041,19 @@ Status ExportStreamNext(const 
std::shared_ptr<RecordBatchReader>& src, int64_t i
   }
 }
 
+Status ExportDeviceStreamNext(const std::shared_ptr<RecordBatchReader>& src, 
int64_t,

Review Comment:
   It's in the signature so that we can leverage overloading instead of having 
to add `if constexpr` checks to pass the `int64_t` or not depending on whether 
we're using a `RecordBatchReader` or ` ChunkedArray`. Removing it from the 
signature would prevent being able to use the overloading.



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