Struct WeakObserver 

pub struct WeakObserver(/* private fields */);

Weak handle for code that needs to refer to the observer without extending its lifetime — chiefly sinks that internally hold callbacks back into the observer (e.g. the future ObsToTracingSink re-emitting through the registered tracing dispatcher).

Implementations

impl WeakObserver

pub fn upgrade(&self) -> Option<Arc<dyn Observer>>

Upgrade to a strong reference. Returns None after shutdown() has dropped the last strong reference.

Trait Implementations

impl Clone for WeakObserver

fn clone(&self) -> WeakObserver

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for WeakObserver

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

Formats the value using the given formatter.