it's ugly but it works

2021/src/day18.rs

@@ -91,14 +91,10 @@ fn explode(node: &mut Node, depth: usize) -> Option<(u8, u8)> {
     if let Leaf(_) = node {return None;}
 
     if depth >= 4 {
-        let (left, right) = node.unwrap_branch();
-        match (left, right) {
-            (Leaf(v1), Leaf(v2)) => {
-                let result = (*v1, *v2);
-                *node = Leaf(0);
-                return Some(result);
-            },
-            _ => (),
+        if let (Leaf(v1), Leaf(v2)) = node.unwrap_branch() {
+            let result = (*v1, *v2);
+            *node = Leaf(0);
+            return Some(result);
         }
     }