add peek_lru

John Smith · Christien Rioux · commit 6870e4e97cf8 · 2023-09-02T18:19:10.000-04:00
diff --git a/src/lru_cache.rs b/src/lru_cache.rs
@@ -262,6 +262,14 @@ where
     pub fn remove_lru(&mut self) -> Option<(K, V)> {
         self.map.pop_front()
     }
+
+    /// Peek at the least recently used entry and return a reference to it.
+    ///
+    /// If the `LruCache` is empty this will return None.
+    #[inline]
+    pub fn peek_lru(&mut self) -> Option<(&K, &V)> {
+        self.map.front()
+    }
 }
 
 impl<K: Hash + Eq + Clone, V: Clone, S: BuildHasher + Default + Clone> Clone for LruCache<K, V, S> {

Original file line number	Diff line number	Diff line change
`@@ -262,6 +262,14 @@ where`
`262`	`262`	`pub fn remove_lru(&mut self) -> Option<(K, V)> {`
`263`	`263`	`self.map.pop_front()`
`264`	`264`	`}`
	`265`	`+`
	`266`	`+ /// Peek at the least recently used entry and return a reference to it.`
	`267`	`+ ///`
	`268`	+ /// If the `LruCache` is empty this will return None.
	`269`	`+ #[inline]`
	`270`	`+ pub fn peek_lru(&mut self) -> Option<(&K, &V)> {`
	`271`	`+ self.map.front()`
	`272`	`+ }`
`265`	`273`	`}`
`266`	`274`
`267`	`275`	`impl<K: Hash + Eq + Clone, V: Clone, S: BuildHasher + Default + Clone> Clone for LruCache<K, V, S> {`