[jira] [Updated] (ARROW-12859) [C++] Add ScalarFromJSON for easier testing

["David Li (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-12859?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

David Li updated ARROW-12859:
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    Description: We have ArrayFromJSON and various others but not DatumFromJSON which would make things a little easier.  (was: For kernels that accept/return permutations of array/scalar arguments, having a single DatumFromJSON would make things much easier to test (as then we can have helper test methods that just take {{const std::string&}} instead of having to make many overloads for the various input/output permutations).)

> [C++] Add ScalarFromJSON for easier testing
> -------------------------------------------
>
>                 Key: ARROW-12859
>                 URL: https://issues.apache.org/jira/browse/ARROW-12859
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: David Li
>            Assignee: David Li
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> We have ArrayFromJSON and various others but not DatumFromJSON which would make things a little easier.



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