Struct Observer 

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

A synchronous, non-blocking observer. Callbacks must not panic or call back into the service. Without an observer there is no event queue or task.

Implementations

impl Observer

pub fn new(callback: impl Fn(Event) + Send + Sync + 'static) -> Self

Trait Implementations

impl Clone for Observer

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Observer

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

Formats the value using the given formatter.

impl Default for Observer

fn default() -> Self

Returns the “default value” for a type.