refactor: change the return type of BinarySearchTree::get_root to reference

Lingxuan-Ye · Lingxuan-Ye · commit 1c43d21512e8 · 2026-01-28T20:19:15.000+08:00
diff --git a/codes/rust/chapter_tree/binary_search_tree.rs b/codes/rust/chapter_tree/binary_search_tree.rs
@@ -25,8 +25,8 @@ impl BinarySearchTree {
     }
 
     /* 获取二叉树根节点 */
-    pub fn get_root(&self) -> Option<Rc<RefCell<TreeNode>>> {
-        self.root.clone()
+    pub fn get_root(&self) -> &Option<Rc<RefCell<TreeNode>>> {
+        &self.root
     }
 
     /* 查找节点 */

Original file line number	Diff line number	Diff line change
`@@ -25,8 +25,8 @@ impl BinarySearchTree {`
`25`	`25`	`}`
`26`	`26`
`27`	`27`	`/* 获取二叉树根节点 */`
`28`		`- pub fn get_root(&self) -> Option<Rc<RefCell<TreeNode>>> {`
`29`		`- self.root.clone()`
	`28`	`+ pub fn get_root(&self) -> &Option<Rc<RefCell<TreeNode>>> {`
	`29`	`+ &self.root`
`30`	`30`	`}`
`31`	`31`
`32`	`32`	`/* 查找节点 */`