[GitHub] [arrow] lidavidm commented on a change in pull request #11145: ARROW-13982: [C++] Don't hang if a fragment is filtered out

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lidavidm commented on a change in pull request #11145:
URL: https://github.com/apache/arrow/pull/11145#discussion_r707776161



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File path: cpp/src/arrow/util/async_generator.h
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@@ -1611,4 +1611,48 @@ AsyncGenerator<T> MakeCancellable(AsyncGenerator<T> source, StopToken stop_token
   return CancellableGenerator<T>{std::move(source), std::move(stop_token)};
 }
 
+template <typename T>
+class OrGenerator {

Review comment:
       Ah, I was trying to come up with a good name. I'll change to something along those lines. (I was looking at Rust's Option::or which is a little too terse in this context.)




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