[jira] [Assigned] (ARROW-6515) [C++] Remove IsSignedInt trait

["Francois Saint-Jacques (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-6515?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Francois Saint-Jacques reassigned ARROW-6515:
---------------------------------------------

    Assignee: Francois Saint-Jacques  (was: Ben Kietzman)

> [C++] Remove IsSignedInt trait
> ------------------------------
>
>                 Key: ARROW-6515
>                 URL: https://issues.apache.org/jira/browse/ARROW-6515
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Ben Kietzman
>            Assignee: Francois Saint-Jacques
>            Priority: Major
>             Fix For: 1.0.0
>
>
> {{IsSignedInt}} takes either an array or a type as a type argument, which is surprisingly atypical for traits. Furthermore whereas {{is_signed_integer}} returns false for date and other types which are represented by but not identical to integers {{IsSignedInt}} returns true by checking only the {{c_type}}, which leads to {{static_assert(IsSignedInt<HalfFloatType>::value, "")}}. Finally the declaration of {{IsSignedInt}} is far from readable due to nested macro usage.



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