[jira] [Resolved] (ARROW-9214) [C++] Avoid util::optional in favor of separate inlineable functions in arrow/visitor_inline.h

["Wes McKinney (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-9214?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wes McKinney resolved ARROW-9214.
---------------------------------
    Resolution: Fixed

Issue resolved by pull request 7525
[https://github.com/apache/arrow/pull/7525]

> [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
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.0.0
>
>          Time Spent: 1h 40m
>  Remaining Estimate: 0h
>
> 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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