Struct ComponentIdFor 

pub struct ComponentIdFor<'s, T>(/* private fields */)
where
    T: Component;

A SystemParam that provides access to the ComponentId for a specific type.

Example

#[derive(Component)]
struct Player;
fn my_system(component_id: ComponentIdFor<Player>) {
    let component_id: ComponentId = component_id.get();
    // ...
}

Implementations

impl<T> ComponentIdFor<'_, T>

where T: Component,

pub fn get(&self) -> ComponentId

Gets the ComponentId for the type T.

Trait Implementations

impl<T> Deref for ComponentIdFor<'_, T>

where T: Component,

type Target = ComponentId

The resulting type after dereferencing.

fn deref(&self) -> &<ComponentIdFor<'_, T> as Deref>::Target

Dereferences the value.

impl<T> From<ComponentIdFor<'_, T>> for ComponentId

where T: Component,

fn from(to_component_id: ComponentIdFor<'_, T>) -> ComponentId

Converts to this type from the input type.

impl<T> SystemParam for ComponentIdFor<'_, T>

where T: Component,

type State = FetchState<T>

Used to store data which persists across invocations of a system.

type Item<'w, 's> = ComponentIdFor<'s, T>

The item type returned when constructing this system param. The value of this associated type should be Self, instantiated with new lifetimes.

fn init_state( world: &mut World, system_meta: &mut SystemMeta, ) -> <ComponentIdFor<'_, T> as SystemParam>::State

Registers any World access used by this SystemParam and creates a new instance of this param’s State.

fn new_archetype( state: &mut <ComponentIdFor<'_, T> as SystemParam>::State, archetype: &Archetype, system_meta: &mut SystemMeta, )

For the specified Archetype, registers the components accessed by this SystemParam (if applicable).

fn apply( state: &mut <ComponentIdFor<'_, T> as SystemParam>::State, system_meta: &SystemMeta, world: &mut World, )

Applies any deferred mutations stored in this SystemParam’s state. This is used to apply Commands during apply_deferred.

unsafe fn get_param<'w, 's>( state: &'s mut <ComponentIdFor<'_, T> as SystemParam>::State, system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, change_tick: Tick, ) -> <ComponentIdFor<'_, T> as SystemParam>::Item<'w, 's>

Creates a parameter to be passed into a SystemParamFunction.

impl<'w, 's, T> ReadOnlySystemParam for ComponentIdFor<'s, T>

where T: Component, Local<'s, InitComponentId<T>>: ReadOnlySystemParam,