[C++] Remove unnecessary copies of shared_ptr in Type::BOOL and Type::NA at GrouperImpl #49065

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Component: C++Type: enhancement

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on Jan 29, 2026

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arrow/cpp/src/arrow/compute/row/grouper.cc

Line 344 in 3e6182a

// TODO(wesm): eliminate this probably unneeded shared_ptr copy

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C++

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HyukjinKwon

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Component: C++Type: enhancement

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