Struct Subscription 

pub struct Subscription { /* private fields */ }

RAII guard returned by on_* register methods. Dropping it deregisters the subscription.

For broadcast/watch-backed subscriptions, dropping the returned stream/receiver is itself the unsubscribe; this guard wraps an optional deregistration closure for the cases (idempotent handler removal) that need explicit cleanup.

Implementations

impl Subscription

pub fn new(on_drop: impl FnOnce() + Send + Sync + 'static) -> Self

Create a subscription guard whose Drop runs on_drop.

pub fn noop() -> Self

Create a no-op subscription guard (used when dropping the returned stream is the unsubscribe).

pub fn detach(self)

Detach the guard so dropping it no longer deregisters (subscription becomes permanent).

Trait Implementations

impl Debug for Subscription

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

Formats the value using the given formatter.

impl Drop for Subscription

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.