cyb70289 commented on a change in pull request #9975:
URL: https://github.com/apache/arrow/pull/9975#discussion_r614550187
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File path: cpp/src/arrow/util/vector.h
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@@ -130,7 +130,7 @@ Result<std::vector<T>>
UnwrapOrRaise(std::vector<Result<T>>&& results) {
}
out.push_back(it->MoveValueUnsafe());
}
- return out;
+ return std::move(out);
Review comment:
Looks to me this `std::move` does no harm.
Regarding RVO, as we are returning `Result` wrapped object, not the object
itself, to my knowledge, there must be a temporary object to be moved or copied
by `Result`.
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