tustvold commented on code in PR #5769:
URL: https://github.com/apache/arrow-rs/pull/5769#discussion_r1602069374
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arrow-buffer/src/interval.rs:
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@@ -0,0 +1,407 @@
+use crate::arith::derive_arith;
+use std::ops::Neg;
+
+/// Value of an IntervalMonthDayNano array
+#[derive(Debug, Default, Copy, Clone, Eq, PartialEq, Hash, Ord, PartialOrd)]
+#[repr(C)]
+pub struct IntervalMonthDayNano {
+ pub months: i32,
+ pub days: i32,
+ pub nanoseconds: i64,
+}
+
+impl IntervalMonthDayNano {
+ /// The additive identity i.e. `0`.
+ pub const ZERO: Self = Self::new(0, 0, 0);
+
+ /// The multiplicative identity, i.e. `1`.
+ pub const ONE: Self = Self::new(1, 1, 1);
+
+ /// The multiplicative inverse, i.e. `-1`.
+ pub const MINUS_ONE: Self = Self::new(-1, -1, -1);
+
+ /// The maximum value that can be represented
+ pub const MAX: Self = Self::new(i32::MAX, i32::MAX, i64::MAX);
+
+ /// The minimum value that can be represented
+ pub const MIN: Self = Self::new(i32::MIN, i32::MIN, i64::MIN);
+
+ /// Create a new [`IntervalMonthDayNano`]
+ #[inline]
+ pub const fn new(months: i32, days: i32, nanoseconds: i64) -> Self {
+ Self {
+ months,
+ days,
+ nanoseconds,
+ }
+ }
+
+ /// Computes the absolute value
+ #[inline]
+ pub fn wrapping_abs(self) -> Self {
Review Comment:
These arithmetic operations are a little odd, but it's necessary to
implement them in order to keep the type machinery happy
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