SortedLinkedList::pop: change return type to match std::vec::pop

CHANGELOG.md

@@ -45,6 +45,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Changed
 
 - Changed `stable_deref_trait` to a platform-dependent dependency.
+- Changed `SortedLinkedList::pop` return type from `Result<T, ()>` to `Option<T>` to match `std::vec::pop`.
 
 ### Fixed
 

src/sorted_linked_list.rs

@@ -390,10 +390,10 @@ where
     /// *find += 1000;
     /// find.finish();
     ///
-    /// assert_eq!(ll.pop(), Ok(1002));
+    /// assert_eq!(ll.pop(), Some(1002));
-    /// assert_eq!(ll.pop(), Ok(3));
+    /// assert_eq!(ll.pop(), Some(3));
-    /// assert_eq!(ll.pop(), Ok(1));
+    /// assert_eq!(ll.pop(), Some(1));
-    /// assert_eq!(ll.pop(), Err(()));
+    /// assert_eq!(ll.pop(), None);
     /// ```
     pub fn find_mut<F>(&mut self, mut f: F) -> Option<FindMutInner<'_, T, Idx, K, S>>
     where
@@ -491,16 +491,15 @@ where
     /// ll.push(1).unwrap();
     /// ll.push(2).unwrap();
     ///
-    /// assert_eq!(ll.pop(), Ok(2));
+    /// assert_eq!(ll.pop(), Some(2));
-    /// assert_eq!(ll.pop(), Ok(1));
+    /// assert_eq!(ll.pop(), Some(1));
-    /// assert_eq!(ll.pop(), Err(()));
+    /// assert_eq!(ll.pop(), None);
     /// ```
-    #[allow(clippy::result_unit_err)]
+    pub fn pop(&mut self) -> Option<T> {
-    pub fn pop(&mut self) -> Result<T, ()> {
         if !self.is_empty() {
-            Ok(unsafe { self.pop_unchecked() })
+            Some(unsafe { self.pop_unchecked() })
         } else {
-            Err(())
+            None
         }
     }
 
@@ -652,9 +651,9 @@ where
     /// let mut find = ll.find_mut(|v| *v == 2).unwrap();
     /// find.pop();
     ///
-    /// assert_eq!(ll.pop(), Ok(3));
+    /// assert_eq!(ll.pop(), Some(3));
-    /// assert_eq!(ll.pop(), Ok(1));
+    /// assert_eq!(ll.pop(), Some(1));
-    /// assert_eq!(ll.pop(), Err(()));
+    /// assert_eq!(ll.pop(), None);
     /// ```
     #[inline]
     pub fn pop(mut self) -> T {
@@ -685,10 +684,10 @@ where
     /// *find += 1000;
     /// find.finish(); // Will resort, we accessed (and updated) the value.
     ///
-    /// assert_eq!(ll.pop(), Ok(1002));
+    /// assert_eq!(ll.pop(), Some(1002));
-    /// assert_eq!(ll.pop(), Ok(3));
+    /// assert_eq!(ll.pop(), Some(3));
-    /// assert_eq!(ll.pop(), Ok(1));
+    /// assert_eq!(ll.pop(), Some(1));
-    /// assert_eq!(ll.pop(), Err(()));
+    /// assert_eq!(ll.pop(), None);
     /// ```
     #[inline]
     pub fn finish(self) {