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https://issues.apache.org/jira/browse/ARROW-6817?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Henri Gough closed ARROW-6817.
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Resolution: Invalid
> dynamic_cast fails on Mac C++
> ------------------------------
>
> Key: ARROW-6817
> URL: https://issues.apache.org/jira/browse/ARROW-6817
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++
> Affects Versions: 0.15.0
> Environment: OSX Clang9 Conda pyarrow package 0.15, also tried with
> 14, 14.1.
> Reporter: Henri Gough
> Priority: Minor
>
> this dynamic_cast fails for me on Mac using Clang9. Was originally trying to
> use TupleFromTable stl function. Though, I'm not sure how the tests pass.
> Maybe because they run in Release with NDEBUG
> {code:java}
> using namespace arrow;
> std::shared_ptr<Array> arrptr;
> {
> auto builder = Int64Builder();
> auto st = builder.AppendValues(std::vector<std::int64_t>{1, 2, 3, 45});
> auto fst = builder.Finish(&arrptr);
> }
> std::cout << std::is_polymorphic<FlatArray>::value << std::endl;
> std::cout << std::is_polymorphic<Int64Array>::value << std::endl;
> std::cout << std::is_base_of<Array, FlatArray>::value << std::endl;
> std::cout << std::is_base_of<FlatArray, Int64Array>::value << std::endl;
> const auto& iarr = static_cast<const Int64Array&>(*arrptr);
> {code}
>
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