Struct NoopObserver 

pub struct NoopObserver;

An observer that ignores everything.

Trait Implementations

impl Clone for NoopObserver

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for NoopObserver

impl Debug for NoopObserver

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

Formats the value using the given formatter.

impl Default for NoopObserver

fn default() -> Self

Returns the “default value” for a type.

impl Observer for NoopObserver

fn observe(&self, _signal: &Signal)

Observes a signal without labels.

fn observe_labeled(&self, signal: &Signal, labels: &SignalLabels)

Observes a signal with labels. The default drops the labels.

fn observe_duration( &self, signal: &Signal, duration: Duration, labels: &SignalLabels, )

Observes a duration signal (SignalKind::DurationMillis or SignalKind::DurationMicros) with its measured value. The default drops the value and forwards to Observer::observe_labeled.