Wes McKinney created ARROW-9214:
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Summary: [C++] Avoid util::optional in favor of separate
inlineable functions in arrow/visitor_inline.h
Key: ARROW-9214
URL: https://issues.apache.org/jira/browse/ARROW-9214
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Reporter: Wes McKinney
Assignee: Wes McKinney
Fix For: 1.0.0
Currently null is being checked for twice (once when deciding what kind of
optional to send to the passed function, and then again inside that function)
when it only need be checked once
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