Adding an archetype accessor for a slice of all entities stored within

macros/src/generate/world.rs

@@ -675,6 +675,11 @@ fn section_archetype(archetype_data: &DataArchetype) -> TokenStream {
                 self.data.version()
             }
 
+            #[inline(always)]
+            fn entities(&self) -> &[Entity<#Archetype>] {
+                self.data.get_slice_entities()
+            }
+
             #[inline(always)]
             fn create(
                 &mut self,

src/traits.rs

@@ -220,6 +220,10 @@ where
     /// Returns the generational version of the archetype. Intended for internal use.
     fn version(&self) -> ArchetypeVersion;
 
+    /// Returns a read-only slice of all entities in this archetype.
+    /// This slice is ordered arbitrarily and may change at later points.
+    fn entities(&self) -> &[Entity<Self>];
+
     /// Creates a new entity with the given components to this archetype storage.
     /// Returns a typed entity handle pointing to the new entity in the archetype.
     ///