westonpace commented on code in PR #33847:
URL: https://github.com/apache/arrow/pull/33847#discussion_r1088951185
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cpp/src/arrow/type.h:
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@@ -288,31 +288,46 @@ std::shared_ptr<DataType> GetPhysicalType(const
std::shared_ptr<DataType>& type)
class ARROW_EXPORT FixedWidthType : public DataType {
public:
using DataType::DataType;
+ // This is only for preventing defining this class in each
+ // translation unit to avoid one-definition-rule violation.
+ ~FixedWidthType() override;
Review Comment:
Yes, that is what it means. I think "wasteful" is too strong of a word
though. I think the consequence should generally be minor enough that it isn't
really a concern.
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