westonpace commented on a change in pull request #10205:
URL: https://github.com/apache/arrow/pull/10205#discussion_r626237982
##########
File path: cpp/src/arrow/util/future.h
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@@ -691,20 +862,29 @@ struct Continue {
}
};
-template <typename T = detail::Empty>
+template <typename T = internal::Empty>
util::optional<T> Break(T break_value = {}) {
return util::optional<T>{std::move(break_value)};
}
-template <typename T = detail::Empty>
+template <typename T = internal::Empty>
using ControlFlow = util::optional<T>;
+template <typename T>
+void ForwardControlResult(const Result<ControlFlow<T>>& result, Future<T>&
sink) {
Review comment:
At this point we're done with `break_fut` so I changed it to move
`break_fut` and got rid of the `&`.
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