bkietz commented on a change in pull request #8680:
URL: https://github.com/apache/arrow/pull/8680#discussion_r534335689
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File path: cpp/src/arrow/util/functional.h
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@@ -79,5 +84,47 @@ struct call_traits {
typename std::enable_if<std::is_same<return_type<F>, T>::value, RT>;
};
+/// A type erased callable object which may only be invoked once.
Review comment:
yes, with the added guarantee that when it is called it will drop all
references which it has in closure
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