scovich commented on code in PR #8611:
URL: https://github.com/apache/arrow-rs/pull/8611#discussion_r2430393691
##########
parquet-variant-compute/src/variant_array_builder.rs:
##########
@@ -162,6 +173,17 @@ impl VariantArrayBuilder {
}
}
+impl<'m, 'v> Extend<Option<Variant<'m, 'v>>> for VariantArrayBuilder {
+ fn extend<T: IntoIterator<Item = Option<Variant<'m, 'v>>>>(&mut self,
iter: T) {
Review Comment:
> I wonder if it's fine to just support the `Option<T>` case, as it follows
the other builder `Extend` impls.
I mean, any support is better than none. But we have existing use cases in
the code for both `Option<T>` and `T`.
There seems to be an odd split here:
* We have both [`impl From<Vec<Option<bool>> for
BooleanArray`](https://docs.rs/arrow/latest/arrow/array/struct.BooleanArray.html#impl-From%3CVec%3COption%3Cbool%3E%3E%3E-for-BooleanArray)
and [`impl From<Vec<bool>> for
BooleanArray`](https://docs.rs/arrow/latest/arrow/array/struct.BooleanArray.html#impl-From%3CVec%3Cbool%3E%3E-for-BooleanArray)
* But we only have [`impl FromIterator<Option<bool>> for
BooleanArray`](https://docs.rs/arrow/latest/arrow/array/struct.BooleanArray.html#impl-FromIterator%3CPtr%3E-for-BooleanArray)
and [`impl Extend<Option<bool> for
BooleanBuilder`](https://docs.rs/arrow/latest/arrow/array/struct.BooleanBuilder.html#impl-Extend%3COption%3Cbool%3E%3E-for-BooleanBuilder)
So maybe you're right, that to mirror existing conventions we should _not_
`Extend<Variant>`. And should potentially consider adding the two
`From<Vec<...>>`?
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