Trait TriggerTargets

pub trait TriggerTargets:
    Send
    + Sync
    + 'static {
    // Required methods
    fn components(&self) -> impl ExactSizeIterator<Item = ComponentId>;
    fn entities(&self) -> impl ExactSizeIterator<Item = Entity>;
}

Represents a collection of targets for a specific Trigger of an Event. Targets can be of type Entity or ComponentId. When a trigger occurs for a given event and TriggerTargets, any Observer that watches for that specific event-target combination will run.

Required Methods

fn components(&self) -> impl ExactSizeIterator<Item = ComponentId>

The components the trigger should target.

fn entities(&self) -> impl ExactSizeIterator<Item = Entity>

The entities the trigger should target.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl TriggerTargets for ()

fn components(&self) -> impl ExactSizeIterator<Item = ComponentId>

fn entities(&self) -> impl ExactSizeIterator<Item = Entity>

impl TriggerTargets for Vec<ComponentId>

fn components(&self) -> impl ExactSizeIterator<Item = ComponentId>

fn entities(&self) -> impl ExactSizeIterator<Item = Entity>

impl TriggerTargets for Vec<Entity>

fn components(&self) -> impl ExactSizeIterator<Item = ComponentId>

fn entities(&self) -> impl ExactSizeIterator<Item = Entity>

impl<const N: usize> TriggerTargets for [ComponentId; N]

fn components(&self) -> impl ExactSizeIterator<Item = ComponentId>

fn entities(&self) -> impl ExactSizeIterator<Item = Entity>

impl<const N: usize> TriggerTargets for [Entity; N]

fn components(&self) -> impl ExactSizeIterator<Item = ComponentId>

fn entities(&self) -> impl ExactSizeIterator<Item = Entity>

Implementors

impl TriggerTargets for ComponentId

impl TriggerTargets for Entity