askoa commented on code in PR #3553:
URL: https://github.com/apache/arrow-rs/pull/3553#discussion_r1083508266
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arrow-array/src/types.rs:
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@@ -240,6 +244,22 @@ impl ArrowDictionaryKeyType for UInt32Type {}
impl ArrowDictionaryKeyType for UInt64Type {}
+/// A subtype of primitive type that is used as run-ends index
+/// in RunEndEncodedArray.
+/// See <https://arrow.apache.org/docs/format/Columnar.html>
+///
+/// # Sealed: The implementation of this trait is sealed to avoid accidental
misuse.
+pub trait ArrowRunEndIndexType: ArrowPrimitiveType + private::Sealed {}
Review Comment:
I can change this to `RunEndIndexType`. I am not too attached to the names I
used. I just don't want to keep changing it based on different reviewer's views.
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