pub struct NullObserver;Expand description
No-op observer that discards all events. Used for backwards compatibility with non-event-aware code.
Trait Implementations§
Source§impl PipelineObserver for NullObserver
impl PipelineObserver for NullObserver
Source§fn on_event(&self, _event: &PipelineEvent)
fn on_event(&self, _event: &PipelineEvent)
Called when an event occurs.
Auto Trait Implementations§
impl Freeze for NullObserver
impl RefUnwindSafe for NullObserver
impl Send for NullObserver
impl Sync for NullObserver
impl Unpin for NullObserver
impl UnsafeUnpin for NullObserver
impl UnwindSafe for NullObserver
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
Source§impl<T> Instrument for T
impl<T> Instrument for T
Source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
Source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
Source§impl<T> IntoEither for T
impl<T> IntoEither for T
Source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
Converts
self into a Left variant of Either<Self, Self>
if into_left is true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read moreSource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
Converts
self into a Left variant of Either<Self, Self>
if into_left(&self) returns true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read more