Implement last on the GroupBy and GroupByMut Iterators

Kerollmops · Kerollmops · commit 005912fce877 · 2020-12-10T11:22:29.000+01:00
diff --git a/library/core/src/slice/iter.rs b/library/core/src/slice/iter.rs
@@ -3018,6 +3018,11 @@ where P: FnMut(&T, &T) -> bool,
             (1, Some(self.slice.len()))
         }
     }
+
+    #[inline]
+    fn last(self) -> Option<Self::Item> {
+        self.next_back()
+    }
 }
 
 #[unstable(feature = "slice_group_by", issue = "0")]
@@ -3098,6 +3103,11 @@ where P: FnMut(&T, &T) -> bool,
             (1, Some(self.slice.len()))
         }
     }
+
+    #[inline]
+    fn last(self) -> Option<Self::Item> {
+        self.next_back()
+    }
 }
 
 #[unstable(feature = "slice_group_by", issue = "0")]

Original file line number	Diff line number	Diff line change
`@@ -3018,6 +3018,11 @@ where P: FnMut(&T, &T) -> bool,`
`3018`	`3018`	`(1, Some(self.slice.len()))`
`3019`	`3019`	`}`
`3020`	`3020`	`}`
	`3021`	`+`
	`3022`	`+ #[inline]`
	`3023`	`+ fn last(self) -> Option<Self::Item> {`
	`3024`	`+ self.next_back()`
	`3025`	`+ }`
`3021`	`3026`	`}`
`3022`	`3027`
`3023`	`3028`	`#[unstable(feature = "slice_group_by", issue = "0")]`
`@@ -3098,6 +3103,11 @@ where P: FnMut(&T, &T) -> bool,`
`3098`	`3103`	`(1, Some(self.slice.len()))`
`3099`	`3104`	`}`
`3100`	`3105`	`}`
	`3106`	`+`
	`3107`	`+ #[inline]`
	`3108`	`+ fn last(self) -> Option<Self::Item> {`
	`3109`	`+ self.next_back()`
	`3110`	`+ }`
`3101`	`3111`	`}`
`3102`	`3112`
`3103`	`3113`	`#[unstable(feature = "slice_group_by", issue = "0")]`