Add iter_many_manual QueryState method

crates/bevy_ecs/src/query/state.rs

@@ -635,6 +635,41 @@ impl<Q: WorldQuery, F: ReadOnlyWorldQuery> QueryState<Q, F> {
         }
     }
 
+    /// Returns an [`Iterator`] over the read-only query items generated from an [`Entity`] list.
+    ///
+    /// Items are returned in the order of the list of entities.
+    /// Entities that don't match the query are skipped.
+    ///
+    /// If `world` archetypes changed since [`Self::update_archetypes`] was last called,
+    /// this will skip entities contained in new archetypes.
+    ///
+    /// This can only be called for read-only queries.
+    ///
+    /// # See also
+    ///
+    /// - [`iter_many`](Self::iter_many) to update archetypes.
+    /// - [`iter_manual`](Self::iter_manual) to iterate over all query items.
+    #[inline]
+    pub fn iter_many_manual<'w, 's, EntityList: IntoIterator>(
+        &'s self,
+        world: &'w World,
+        entities: EntityList,
+    ) -> QueryManyIter<'w, 's, Q::ReadOnly, F::ReadOnly, EntityList::IntoIter>
+    where
+        EntityList::Item: Borrow<Entity>,
+    {
+        self.validate_world(world);
+        // SAFETY: query is read only, world id is validated
+        unsafe {
+            self.as_readonly().iter_many_unchecked_manual(
+                entities,
+                world,
+                world.last_change_tick(),
+                world.read_change_tick(),
+            )
+        }
+    }
+
     /// Returns an iterator over the query items generated from an [`Entity`] list.
     ///
     /// Items are returned in the order of the list of entities.