pub struct NullCallbackHandler;Expand description
Callback handler that discards all output.
Trait Implementations§
Source§impl CallbackHandler for NullCallbackHandler
impl CallbackHandler for NullCallbackHandler
Source§fn call(&mut self, _event: &CallbackEvent)
fn call(&mut self, _event: &CallbackEvent)
Handle a callback event.
Auto Trait Implementations§
impl Freeze for NullCallbackHandler
impl RefUnwindSafe for NullCallbackHandler
impl Send for NullCallbackHandler
impl Sync for NullCallbackHandler
impl Unpin for NullCallbackHandler
impl UnwindSafe for NullCallbackHandler
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> FutureExt for T
impl<T> FutureExt for T
Source§fn with_context(self, otel_cx: Context) -> WithContext<Self>
fn with_context(self, otel_cx: Context) -> WithContext<Self>
Source§fn with_current_context(self) -> WithContext<Self>
fn with_current_context(self) -> WithContext<Self>
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 moreCreates a shared type from an unshared type.