WIP: still a bit stumped on DFS vs BFS

packages/core/src/patch.rs

@@ -126,6 +126,7 @@ pub struct EditMachine<'src> {
     pub traversal: Traversal,
     next_temporary: u32,
     forcing_new_listeners: bool,
+
     pub emitter: EditList<'src>,
 }
 
@@ -214,10 +215,6 @@ impl<'a> EditMachine<'a> {
         debug_assert!(self.traversal_is_committed());
         debug_assert!(start < end);
         let temp_base = self.next_temporary;
-        // debug!(
-        //     "emit: save_children_to_temporaries({}, {}, {})",
-        //     temp_base, start, end
-        // );
         self.next_temporary = temp_base + (end - start) as u32;
         self.emitter.push(Edit::SaveChildrenToTemporaries {
             temp: temp_base,
@@ -367,6 +364,11 @@ impl<'a> EditMachine<'a> {
         // debug!("emit: remove_event_listener({:?})", event);
     }
 
+    pub fn save_known_root(&mut self, id: ScopeIdx) {
+        log::debug!("emit: save_known_root({:?})", id);
+        self.emitter.push(Edit::MakeKnown { node: id })
+    }
+
     // pub fn save_template(&mut self, id: CacheId) {
     //     debug_assert!(self.traversal_is_committed());
     //     debug_assert!(!self.has_template(id));