Example for ComponentIdFor

Author: Aceeri

crates/bevy_ecs/src/component.rs

@@ -674,7 +674,17 @@ impl ComponentTicks {
     }
 }
 
-/// Initialize and fetch a component id for a generic type.
+/// Initialize and fetch a [`ComponentId`] for a specific type.
+///
+/// # Example
+/// ```rust
+/// # use bevy_ecs::{system::Local, component::{Component, ComponentIdFor}};
+/// #[derive(Component)]
+/// struct Player;
+/// fn my_system(my_component_id: Local<ComponentIdFor<Player>>) {
+///     // ...
+/// }
+/// ```
 pub struct ComponentIdFor<T: Component> {
     component_id: ComponentId,
     phantom: PhantomData<T>,

crates/bevy_ecs/src/removal_detection.rs

@@ -74,7 +74,6 @@ impl RemovedComponentEvents {
     }
 }
 
-#[derive(SystemParam)]
 /// A [`SystemParam`] that grants access to the entities that had their `T` [`Component`] removed.
 ///
 /// Note that this does not allow you to see which data existed before removal.
@@ -106,6 +105,7 @@ impl RemovedComponentEvents {
 /// }
 /// # bevy_ecs::system::assert_is_system(react_on_removal);
 /// ```
+#[derive(SystemParam)]
 pub struct RemovedComponents<'w, 's, T: Component> {
     component_id: Local<'s, ComponentIdFor<T>>,
     reader: Local<'s, RemovedComponentReader<T>>,