Antoine Pitrou created ARROW-5252:
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             Summary: [C++] Change variant implementation
                 Key: ARROW-5252
                 URL: https://issues.apache.org/jira/browse/ARROW-5252
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
    Affects Versions: 0.13.0
            Reporter: Antoine Pitrou


Our vendored variant implementation, [Mapbox 
variant|https://github.com/mapbox/variant], does not provide the same API as 
the official [C++17 variant 
class|https://en.cppreference.com/w/cpp/utility/variant].

We could / should switch to an implementation that follows the C++17 API, such 
as https://github.com/mpark/variant or 
https://github.com/martinmoene/variant-lite .



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