Per world access lists and utils

crates/bevy_ecs/Cargo.toml

@@ -125,7 +125,11 @@ derive_more = { version = "1", default-features = false, features = [
 ] }
 nonmax = { version = "0.5", default-features = false }
 arrayvec = { version = "0.7.4", default-features = false, optional = true }
-smallvec = { version = "1", features = ["union", "const_generics"] }
+smallvec = { version = "1", features = [
+  "union",
+  "const_generics",
+  "const_new",
+] }
 indexmap = { version = "2.5.0", default-features = false }
 variadics_please = { version = "1.1", default-features = false }
 spin = { version = "0.9.8", default-features = false, features = [

crates/bevy_ecs/macros/src/lib.rs

@@ -490,6 +490,11 @@ pub fn derive_system_param(input: TokenStream) -> TokenStream {
                     unsafe { <#fields_alias::<'_, '_, #punctuated_generic_idents> as #path::system::SystemParam>::new_archetype(&mut state.state, archetype, system_meta) }
                 }
 
+                unsafe fn update_meta(state: &mut Self::State, world: #path::world::unsafe_world_cell::UnsafeWorldCell, system_meta: &mut #path::system::SystemMeta) {
+                    // SAFETY: The caller ensures that `archetype` is from the World the state was initialized from in `init_state`.
+                    unsafe { <#fields_alias::<'_, '_, #punctuated_generic_idents> as #path::system::SystemParam>::update_meta(&mut state.state, world, system_meta) }
+                }
+
                 fn apply(state: &mut Self::State, system_meta: &#path::system::SystemMeta, world: &mut #path::world::World) {
                     <#fields_alias::<'_, '_, #punctuated_generic_idents> as #path::system::SystemParam>::apply(&mut state.state, system_meta, world);
                 }