Separate component and resource access (#14561)

# Objective

- Fixes #13139
- Fixes #7255
- Separates component from resource access so that we can correctly
handles edge cases like the issue above
- Inspired from #14472

## Solution

- Update access to have `component` fields and `resource` fields

## Testing

- Added some unit tests

crates/bevy_ecs/src/lib.rs

@@ -1420,8 +1420,8 @@ mod tests {
         let mut expected = FilteredAccess::<ComponentId>::default();
         let a_id = world.components.get_id(TypeId::of::<A>()).unwrap();
         let b_id = world.components.get_id(TypeId::of::<B>()).unwrap();
-        expected.add_write(a_id);
-        expected.add_read(b_id);
+        expected.add_component_write(a_id);
+        expected.add_component_read(b_id);
         assert!(
             query.component_access.eq(&expected),
             "ComponentId access from query fetch and query filter should be combined"

crates/bevy_ecs/src/query/builder.rs

@@ -142,14 +142,14 @@ impl<'w, D: QueryData, F: QueryFilter> QueryBuilder<'w, D, F> {
     /// Adds `&T` to the [`FilteredAccess`] of self.
     pub fn ref_id(&mut self, id: ComponentId) -> &mut Self {
         self.with_id(id);
-        self.access.add_read(id);
+        self.access.add_component_read(id);
         self
     }
 
     /// Adds `&mut T` to the [`FilteredAccess`] of self.
     pub fn mut_id(&mut self, id: ComponentId) -> &mut Self {
         self.with_id(id);
-        self.access.add_write(id);
+        self.access.add_component_write(id);
         self
     }
 

crates/bevy_ecs/src/query/fetch.rs

@@ -480,10 +480,10 @@ unsafe impl<'a> WorldQuery for EntityRef<'a> {
 
     fn update_component_access(_state: &Self::State, access: &mut FilteredAccess<ComponentId>) {
         assert!(
-            !access.access().has_any_write(),
+            !access.access().has_any_component_write(),
             "EntityRef conflicts with a previous access in this query. Shared access cannot coincide with exclusive access.",
         );
-        access.read_all();
+        access.read_all_components();
     }
 
     fn init_state(_world: &mut World) {}
@@ -556,10 +556,10 @@ unsafe impl<'a> WorldQuery for EntityMut<'a> {
 
     fn update_component_access(_state: &Self::State, access: &mut FilteredAccess<ComponentId>) {
         assert!(
-            !access.access().has_any_read(),
+            !access.access().has_any_component_read(),
             "EntityMut conflicts with a previous access in this query. Exclusive access cannot coincide with any other accesses.",
         );
-        access.write_all();
+        access.write_all_components();
     }
 
     fn init_state(_world: &mut World) {}
@@ -600,7 +600,7 @@ unsafe impl<'a> WorldQuery for FilteredEntityRef<'a> {
         _this_run: Tick,
     ) -> Self::Fetch<'w> {
         let mut access = Access::default();
-        access.read_all();
+        access.read_all_components();
         (world, access)
     }
 
@@ -612,9 +612,9 @@ unsafe impl<'a> WorldQuery for FilteredEntityRef<'a> {
         _table: &Table,
     ) {
         let mut access = Access::default();
-        state.access.reads().for_each(|id| {
+        state.access.component_reads().for_each(|id| {
             if archetype.contains(id) {
-                access.add_read(id);
+                access.add_component_read(id);
             }
         });
         fetch.1 = access;
@@ -623,9 +623,9 @@ unsafe impl<'a> WorldQuery for FilteredEntityRef<'a> {
     #[inline]
     unsafe fn set_table<'w>(fetch: &mut Self::Fetch<'w>, state: &Self::State, table: &'w Table) {
         let mut access = Access::default();
-        state.access.reads().for_each(|id| {
+        state.access.component_reads().for_each(|id| {
             if table.has_column(id) {
-                access.add_read(id);
+                access.add_component_read(id);
             }
         });
         fetch.1 = access;
@@ -703,7 +703,7 @@ unsafe impl<'a> WorldQuery for FilteredEntityMut<'a> {
         _this_run: Tick,
     ) -> Self::Fetch<'w> {
         let mut access = Access::default();
-        access.write_all();
+        access.write_all_components();
         (world, access)
     }
 
@@ -715,14 +715,14 @@ unsafe impl<'a> WorldQuery for FilteredEntityMut<'a> {
         _table: &Table,
     ) {
         let mut access = Access::default();
-        state.access.reads().for_each(|id| {
+        state.access.component_reads().for_each(|id| {
             if archetype.contains(id) {
-                access.add_read(id);
+                access.add_component_read(id);
             }
         });
-        state.access.writes().for_each(|id| {
+        state.access.component_writes().for_each(|id| {
             if archetype.contains(id) {
-                access.add_write(id);
+                access.add_component_write(id);
             }
         });
         fetch.1 = access;
@@ -731,14 +731,14 @@ unsafe impl<'a> WorldQuery for FilteredEntityMut<'a> {
     #[inline]
     unsafe fn set_table<'w>(fetch: &mut Self::Fetch<'w>, state: &Self::State, table: &'w Table) {
         let mut access = Access::default();
-        state.access.reads().for_each(|id| {
+        state.access.component_reads().for_each(|id| {
             if table.has_column(id) {
-                access.add_read(id);
+                access.add_component_read(id);
             }
         });
-        state.access.writes().for_each(|id| {
+        state.access.component_writes().for_each(|id| {
             if table.has_column(id) {
-                access.add_write(id);
+                access.add_component_write(id);
             }
         });
         fetch.1 = access;
@@ -988,11 +988,11 @@ unsafe impl<T: Component> WorldQuery for &T {
         access: &mut FilteredAccess<ComponentId>,
     ) {
         assert!(
-            !access.access().has_write(component_id),
+            !access.access().has_component_write(component_id),
             "&{} conflicts with a previous access in this query. Shared access cannot coincide with exclusive access.",
-                std::any::type_name::<T>(),
+            std::any::type_name::<T>(),
         );
-        access.add_read(component_id);
+        access.add_component_read(component_id);
     }
 
     fn init_state(world: &mut World) -> ComponentId {
@@ -1183,11 +1183,11 @@ unsafe impl<'__w, T: Component> WorldQuery for Ref<'__w, T> {
         access: &mut FilteredAccess<ComponentId>,
     ) {
         assert!(
-            !access.access().has_write(component_id),
+            !access.access().has_component_write(component_id),
             "&{} conflicts with a previous access in this query. Shared access cannot coincide with exclusive access.",
-                std::any::type_name::<T>(),
+            std::any::type_name::<T>(),
         );
-        access.add_read(component_id);
+        access.add_component_read(component_id);
     }
 
     fn init_state(world: &mut World) -> ComponentId {
@@ -1378,11 +1378,11 @@ unsafe impl<'__w, T: Component> WorldQuery for &'__w mut T {
         access: &mut FilteredAccess<ComponentId>,
     ) {
         assert!(
-            !access.access().has_read(component_id),
+            !access.access().has_component_read(component_id),
             "&mut {} conflicts with a previous access in this query. Mutable component access must be unique.",
-                std::any::type_name::<T>(),
+            std::any::type_name::<T>(),
         );
-        access.add_write(component_id);
+        access.add_component_write(component_id);
     }
 
     fn init_state(world: &mut World) -> ComponentId {
@@ -1476,11 +1476,11 @@ unsafe impl<'__w, T: Component> WorldQuery for Mut<'__w, T> {
         // Update component access here instead of in `<&mut T as WorldQuery>` to avoid erroneously referencing
         // `&mut T` in error message.
         assert!(
-            !access.access().has_read(component_id),
+            !access.access().has_component_read(component_id),
             "Mut<{}> conflicts with a previous access in this query. Mutable component access mut be unique.",
-                std::any::type_name::<T>(),
+            std::any::type_name::<T>(),
         );
-        access.add_write(component_id);
+        access.add_component_write(component_id);
     }
 
     // Forwarded to `&mut T`

crates/bevy_ecs/src/query/filter.rs

@@ -688,10 +688,10 @@ unsafe impl<T: Component> WorldQuery for Added<T> {
 
     #[inline]
     fn update_component_access(&id: &ComponentId, access: &mut FilteredAccess<ComponentId>) {
-        if access.access().has_write(id) {
+        if access.access().has_component_write(id) {
             panic!("$state_name<{}> conflicts with a previous access in this query. Shared access cannot coincide with exclusive access.",std::any::type_name::<T>());
         }
-        access.add_read(id);
+        access.add_component_read(id);
     }
 
     fn init_state(world: &mut World) -> ComponentId {
@@ -899,10 +899,10 @@ unsafe impl<T: Component> WorldQuery for Changed<T> {
 
     #[inline]
     fn update_component_access(&id: &ComponentId, access: &mut FilteredAccess<ComponentId>) {
-        if access.access().has_write(id) {
+        if access.access().has_component_write(id) {
             panic!("$state_name<{}> conflicts with a previous access in this query. Shared access cannot coincide with exclusive access.",std::any::type_name::<T>());
         }
-        access.add_read(id);
+        access.add_component_read(id);
     }
 
     fn init_state(world: &mut World) -> ComponentId {

crates/bevy_ecs/src/query/state.rs

@@ -495,16 +495,22 @@ impl<D: QueryData, F: QueryFilter> QueryState<D, F> {
         archetype: &Archetype,
         access: &mut Access<ArchetypeComponentId>,
     ) {
-        self.component_access.access.reads().for_each(|id| {
-            if let Some(id) = archetype.get_archetype_component_id(id) {
-                access.add_read(id);
-            }
-        });
-        self.component_access.access.writes().for_each(|id| {
-            if let Some(id) = archetype.get_archetype_component_id(id) {
-                access.add_write(id);
-            }
-        });
+        self.component_access
+            .access
+            .component_reads()
+            .for_each(|id| {
+                if let Some(id) = archetype.get_archetype_component_id(id) {
+                    access.add_component_read(id);
+                }
+            });
+        self.component_access
+            .access
+            .component_writes()
+            .for_each(|id| {
+                if let Some(id) = archetype.get_archetype_component_id(id) {
+                    access.add_component_write(id);
+                }
+            });
     }
 
     /// Use this to transform a [`QueryState`] into a more generic [`QueryState`].

crates/bevy_ecs/src/schedule/mod.rs

@@ -737,6 +737,9 @@ mod tests {
         #[derive(Event)]
         struct E;
 
+        #[derive(Resource, Component)]
+        struct RC;
+
         fn empty_system() {}
         fn res_system(_res: Res<R>) {}
         fn resmut_system(_res: ResMut<R>) {}
@@ -746,6 +749,8 @@ mod tests {
         fn write_component_system(_query: Query<&mut A>) {}
         fn with_filtered_component_system(_query: Query<&mut A, With<B>>) {}
         fn without_filtered_component_system(_query: Query<&mut A, Without<B>>) {}
+        fn entity_ref_system(_query: Query<EntityRef>) {}
+        fn entity_mut_system(_query: Query<EntityMut>) {}
         fn event_reader_system(_reader: EventReader<E>) {}
         fn event_writer_system(_writer: EventWriter<E>) {}
         fn event_resource_system(_events: ResMut<Events<E>>) {}
@@ -788,6 +793,8 @@ mod tests {
                 nonsend_system,
                 read_component_system,
                 read_component_system,
+                entity_ref_system,
+                entity_ref_system,
                 event_reader_system,
                 event_reader_system,
                 read_world_system,
@@ -893,6 +900,73 @@ mod tests {
             assert_eq!(schedule.graph().conflicting_systems().len(), 3);
         }
 
+        /// Test that when a struct is both a Resource and a Component, they do not
+        /// conflict with each other.
+        #[test]
+        fn shared_resource_mut_component() {
+            let mut world = World::new();
+            world.insert_resource(RC);
+
+            let mut schedule = Schedule::default();
+            schedule.add_systems((|_: ResMut<RC>| {}, |_: Query<&mut RC>| {}));
+
+            let _ = schedule.initialize(&mut world);
+
+            assert_eq!(schedule.graph().conflicting_systems().len(), 0);
+        }
+
+        #[test]
+        fn resource_mut_and_entity_ref() {
+            let mut world = World::new();
+            world.insert_resource(R);
+
+            let mut schedule = Schedule::default();
+            schedule.add_systems((resmut_system, entity_ref_system));
+
+            let _ = schedule.initialize(&mut world);
+
+            assert_eq!(schedule.graph().conflicting_systems().len(), 0);
+        }
+
+        #[test]
+        fn resource_and_entity_mut() {
+            let mut world = World::new();
+            world.insert_resource(R);
+
+            let mut schedule = Schedule::default();
+            schedule.add_systems((res_system, nonsend_system, entity_mut_system));
+
+            let _ = schedule.initialize(&mut world);
+
+            assert_eq!(schedule.graph().conflicting_systems().len(), 0);
+        }
+
+        #[test]
+        fn write_component_and_entity_ref() {
+            let mut world = World::new();
+            world.insert_resource(R);
+
+            let mut schedule = Schedule::default();
+            schedule.add_systems((write_component_system, entity_ref_system));
+
+            let _ = schedule.initialize(&mut world);
+
+            assert_eq!(schedule.graph().conflicting_systems().len(), 1);
+        }
+
+        #[test]
+        fn read_component_and_entity_mut() {
+            let mut world = World::new();
+            world.insert_resource(R);
+
+            let mut schedule = Schedule::default();
+            schedule.add_systems((read_component_system, entity_mut_system));
+
+            let _ = schedule.initialize(&mut world);
+
+            assert_eq!(schedule.graph().conflicting_systems().len(), 1);
+        }
+
         #[test]
         fn exclusive() {
             let mut world = World::new();

crates/bevy_ecs/src/system/mod.rs

@@ -1495,7 +1495,7 @@ mod tests {
         assert_eq!(
             system
                 .archetype_component_access()
-                .reads()
+                .component_reads()
                 .collect::<HashSet<_>>(),
             expected_ids
         );
@@ -1525,7 +1525,7 @@ mod tests {
         assert_eq!(
             system
                 .archetype_component_access()
-                .reads()
+                .component_reads()
                 .collect::<HashSet<_>>(),
             expected_ids
         );
@@ -1543,7 +1543,7 @@ mod tests {
         assert_eq!(
             system
                 .archetype_component_access()
-                .reads()
+                .component_reads()
                 .collect::<HashSet<_>>(),
             expected_ids
         );