edponce commented on a change in pull request #10349:
URL: https://github.com/apache/arrow/pull/10349#discussion_r698884590
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File path: cpp/src/arrow/util/map.h
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@@ -17,13 +17,21 @@
#pragma once
+#include <type_traits>
#include <utility>
#include "arrow/result.h"
namespace arrow {
namespace internal {
+/// Functor to calculate hash of an enum.
Review comment:
Change description to "Functor to make enums hashable."
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