tustvold commented on code in PR #2836:
URL: https://github.com/apache/arrow-rs/pull/2836#discussion_r989001479
##########
arrow-array/src/array/list_array.rs:
##########
@@ -43,6 +43,17 @@ impl OffsetSizeTrait for i64 {
const PREFIX: &'static str = "Large";
}
+/// Returns a slice of `OffsetSize` consisting of a single zero value
+#[inline]
+pub(crate) fn empty_offsets<OffsetSize: OffsetSizeTrait>() -> &'static
[OffsetSize] {
+ static OFFSET: &[i64] = &[0];
Review Comment:
This slightly odd construction is necessary to workaround the fact Rust
doesn't allow statics that depend on type parameters. It gets const folded away
by the compiler
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