Add Eq and Ord for YearMonth + Eq for MonthDay

Author: nekevss

src/components/month_day.rs

@@ -15,7 +15,7 @@ use crate::{
 
 /// The native Rust implementation of `Temporal.PlainMonthDay`
 #[non_exhaustive]
-#[derive(Debug, Default, Clone)]
+#[derive(Debug, Default, Clone, PartialEq, Eq)]
 pub struct PlainMonthDay {
     pub iso: IsoDate,
     calendar: Calendar,

src/components/year_month.rs

@@ -18,7 +18,7 @@ use super::{Duration, PartialDate};
 
 /// The native Rust implementation of `Temporal.YearMonth`.
 #[non_exhaustive]
-#[derive(Debug, Default, Clone)]
+#[derive(Debug, Default, Clone, PartialEq, Eq)]
 pub struct PlainYearMonth {
     pub(crate) iso: IsoDate,
     calendar: Calendar,
@@ -30,6 +30,18 @@ impl core::fmt::Display for PlainYearMonth {
     }
 }
 
+impl Ord for PlainYearMonth {
+    fn cmp(&self, other: &Self) -> core::cmp::Ordering {
+        self.iso.cmp(&other.iso)
+    }
+}
+
+impl PartialOrd for PlainYearMonth {
+    fn partial_cmp(&self, other: &Self) -> Option<core::cmp::Ordering> {
+        Some(self.cmp(other))
+    }
+}
+
 impl PlainYearMonth {
     /// Creates an unvalidated `YearMonth`.
     #[inline]