Don't reduce when target cell is smaller than leaf cell

JayKickliter · Mar 14, 2023 · c6bb8ad · c6bb8ad
1 parent 0680a30
commit c6bb8ad
Showing 1 changed file with 3 additions and 5 deletions.
diff --git a/src/node.rs b/src/node.rs
@@ -150,12 +150,10 @@ impl<V> Node<V> {
         V: Copy,
         F: FnMut(u8, &[V]) -> V,
     {
-        if let Self::Leaf(val) = self {
-            return Some(*val);
-        }
-
         match (digits.next(), self) {
-            (Some(_digit), Self::Leaf(_)) => unreachable!(),
+            // Can't reduce when the target cell is higher resolution
+            // than this leaf node.
+            (Some(_digit), Self::Leaf(_)) => None,
             (Some(digit), Self::Parent(children)) => match &children.as_slice()[digit as usize] {
                 Some(node) => node.reduce(res + 1, digits, f),
                 None => None,