feat(ecs): make relationships creatable without reference to world

1 files changed, 7 insertions, 16 deletions

diff --git a/ecs/src/relationship.rs b/ecs/src/relationship.rs
index 82c9e70..fa3f761 100644
--- a/ecs/src/relationship.rs
+++ b/ecs/src/relationship.rs
@@ -1,6 +1,5 @@
 use std::any::{type_name, Any};
 use std::marker::PhantomData;
-use std::sync::{Arc, Weak};
 
 use crate::component::storage::Storage as ComponentStorage;
 use crate::component::{
@@ -11,7 +10,7 @@ use crate::component::{
     Metadata as ComponentMetadata,
 };
 use crate::entity::Uid as EntityUid;
-use crate::lock::{Lock, ReadGuard};
+use crate::lock::ReadGuard;
 use crate::system::{ComponentRefMut, Input as SystemInput};
 use crate::type_name::TypeName;
 use crate::World;
@@ -20,7 +19,6 @@ use crate::World;
 pub struct Relationship<Kind, ComponentT: Component>
 {
     entity_uid: EntityUid,
-    component_storage: Weak<Lock<ComponentStorage>>,
     _pd: PhantomData<(Kind, ComponentT)>,
 }
 
@@ -28,13 +26,9 @@ impl<Kind, ComponentT> Relationship<Kind, ComponentT>
 where
     ComponentT: Component,
 {
-    pub fn new(world: &World, entity_uid: EntityUid) -> Self
+    pub fn new(entity_uid: EntityUid) -> Self
     {
-        Self {
-            entity_uid,
-            component_storage: Arc::downgrade(&world.data.component_storage),
-            _pd: PhantomData,
-        }
+        Self { entity_uid, _pd: PhantomData }
     }
 }
 
@@ -86,7 +80,6 @@ where
 {
     component_storage_lock: ReadGuard<'static, ComponentStorage>,
     relationship_comp: ComponentRefMut<'rel_comp, Relationship<Kind, ComponentT>>,
-    _component_storage: Arc<Lock<ComponentStorage>>,
 }
 
 impl<'rel_comp, Kind, ComponentT> ComponentFromOptional<'rel_comp>
@@ -98,19 +91,18 @@ where
         optional_component: Option<
             crate::lock::WriteGuard<'rel_comp, Box<dyn Component>>,
         >,
+        world: &'rel_comp World,
     ) -> Self
     {
         let relationship_comp =
             ComponentRefMut::<Relationship<Kind, ComponentT>>::from_optional_component(
                 optional_component,
+                world,
             );
 
-        let component_storage = relationship_comp
+        let component_storage_lock = world
+            .data
             .component_storage
-            .upgrade()
-            .expect("World has been dropped");
-
-        let component_storage_lock = component_storage
             .read_nonblock()
             .expect("Failed to aquire read-only component storage lock");
 
@@ -119,7 +111,6 @@ where
             // SAFETY: The component lock is not used for longer than the original
             // lifetime
             component_storage_lock: unsafe { component_storage_lock.upgrade_lifetime() },
-            _component_storage: component_storage,
         }
     }
 }