Struct ObserverHandle 

pub struct ObserverHandle { /* private fields */ }

RAII guard for an observer callback. Dropping the handle removes the callback from the signal, preventing memory leaks.

Implementations

impl ObserverHandle

pub fn new( keeper: Rc<dyn Any>, observer_id: u64, remover: Rc<dyn Fn(u64)>, ) -> Self

Create a new observer handle.

• keeper: an Rc that keeps the observed source alive while this handle exists.
• observer_id: the ID identifying this observer.
• remover: called with observer_id when the handle is dropped, to unregister the callback.

pub fn detach(self)

Explicitly detach the observer without dropping the handle.

Trait Implementations

impl Debug for ObserverHandle

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

Formats the value using the given formatter.

impl Drop for ObserverHandle

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.