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Posted to issues@arrow.apache.org by "Wes McKinney (JIRA)" <ji...@apache.org> on 2019/01/28 04:25:00 UTC

[jira] [Created] (ARROW-4399) [C++] Remove usage of "extern template class" from NumericArray

Wes McKinney created ARROW-4399:
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             Summary: [C++] Remove usage of "extern template class" from NumericArray<T>
                 Key: ARROW-4399
                 URL: https://issues.apache.org/jira/browse/ARROW-4399
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
            Reporter: Wes McKinney
            Assignee: Wes McKinney
             Fix For: 0.13.0


We aren't using this to any benefit right now (only the simple constructor is being instantiated once, everything else in inline), and the rules about template visibility and linkage vary a lot between compilers, as evidenced by patches such as https://github.com/apache/arrow/pull/3503

In general I think we should try not to use "extern template class" at all in the codebase for the problems that come with it



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