pub trait EventListenerTrait:
Default
+ Copy
+ 'static {
type EventData: ?Sized;
// Required method
fn listener_key() -> EventListenerKey;
// Provided method
fn extract(event: &Event) -> Option<&Self::EventData>
where Self::EventData: Sized { ... }
}Required Associated Types§
Required Methods§
fn listener_key() -> EventListenerKey
Provided Methods§
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.