Struct SubscriptionHandle 

pub struct SubscriptionHandle { /* private fields */ }

An opaque handle returned by EventSource::subscribe.

The source defines what the handle contains; the framework treats it as a token whose Drop impl performs the unsubscription. Returning an empty handle (via SubscriptionHandle::empty) is acceptable for sources that outlive the application or do not support removal.

Implementations

impl SubscriptionHandle

pub fn new<T: 'static>(token: T) -> Self

Wrap an arbitrary value as a subscription handle. The value is dropped when the handle is dropped — typically that drop performs removal from the source’s internal subscriber registry.

pub fn empty() -> Self

A handle that performs no cleanup on drop. Use this for sources that outlive the application or whose subscribers cannot be individually removed.