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Support i256 implement From<i128> #10080

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@AdamGS

i256 currently implements From all other signed types besides i128, but it does have a i256::from_i128.

I'm currently working on average overflow issues in DataFusion which would become much easier if this implementation existed.

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  1. added a commit that references this issue on Jun 7, 2026
    f01ff3d
  2. alamb commented on Jul 2, 2026

    @alamb
    Contributor

    label_issue.py automatically added labels {'arrow'} from #10081

  3. added theissue type on Jul 2, 2026
  4. changed the title [-]i256 doesn't implement From<i128>[/-] [+]Support i256 implement From<i128>[/+] on Jul 2, 2026
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