Struct RemovedComponentMessages 

pub struct RemovedComponentMessages { /* private fields */ }

Stores the RemovedComponents event buffers for all types of component in a given World.

Implementations

impl RemovedComponentMessages

pub fn new() -> RemovedComponentMessages

Creates an empty storage buffer for component removal messages.

pub fn update(&mut self)

For each type of component, swaps the event buffers and clears the oldest event buffer. In general, this should be called once per frame/update.

pub fn iter( &self, ) -> impl Iterator<Item = (&ComponentId, &Messages<RemovedComponentEntity>)>

Returns an iterator over components and their entity messages.

pub fn get( &self, component_id: impl Into<ComponentId>, ) -> Option<&Messages<RemovedComponentEntity>>

Gets the event storage for a given component.

pub fn write(&mut self, component_id: impl Into<ComponentId>, entity: Entity)

Writes a removal message for the specified component.

Trait Implementations

impl Debug for RemovedComponentMessages

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for RemovedComponentMessages

fn default() -> RemovedComponentMessages

Returns the “default value” for a type.

impl<'a> SystemParam for &'a RemovedComponentMessages

type State = ()

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

type Item<'w, 's> = &'w RemovedComponentMessages

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, ) -> <&'a RemovedComponentMessages as SystemParam>::State

Creates a new instance of this param’s State.

fn init_access( _state: &<&'a RemovedComponentMessages as SystemParam>::State, _system_meta: &mut SystemMeta, _component_access_set: &mut FilteredAccessSet, _world: &mut World, )

Registers any World access used by this SystemParam.

unsafe fn get_param<'w, 's>( _state: &'s mut <&'a RemovedComponentMessages as SystemParam>::State, _system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, _change_tick: Tick, ) -> Result<<&'a RemovedComponentMessages as SystemParam>::Item<'w, 's>, SystemParamValidationError>

Creates a parameter to be passed into a SystemParamFunction.

fn apply(state: &mut Self::State, system_meta: &SystemMeta, world: &mut World)

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

fn queue( state: &mut Self::State, system_meta: &SystemMeta, world: DeferredWorld<'_>, )

Queues any deferred mutations to be applied at the next ApplyDeferred.

impl<'a> ReadOnlySystemParam for &'a RemovedComponentMessages