docs: post-creation neighbor edges, no ignore result err

src/entity/graph.rs

@@ -61,11 +61,6 @@ impl Intersection {
         [self.up, self.down, self.left, self.right].into_iter().flatten()
     }
 
-    /// Returns an iterator over all directions that don't have an edge.
-    pub fn empty_directions(&self) -> impl Iterator<Item = Direction> + '_ {
-        DIRECTIONS.into_iter().filter(|dir| self.get(*dir).is_none())
-    }
-
     /// Retrieves the edge in the specified direction, if it exists.
     pub fn get(&self, direction: Direction) -> Option<Edge> {
         match direction {

src/map.rs

@@ -168,12 +168,15 @@ impl Map {
             }
         }
 
+        // While most nodes are already connected to their neighbors, some may not be
         for (grid_pos, &node_id) in &grid_to_node {
             for dir in DIRECTIONS {
+                // If the node doesn't have an edge in this direction, look for a neighbor in that direction
                 if graph.adjacency_list[node_id].get(dir).is_none() {
                     let neighbor = grid_pos + dir.to_ivec2();
+                    // If the neighbor exists, connect the node to it
                     if let Some(&neighbor_id) = grid_to_node.get(&neighbor) {
-                        let _ = graph.connect(node_id, neighbor_id, None, dir);
+                        graph.connect(node_id, neighbor_id, None, dir).expect("Failed to add edge");
                     }
                 }
             }