Struct tracing_core::subscriber::NoSubscriber
source · [−]pub struct NoSubscriber(_);
Expand description
A no-op Subscriber
.
NoSubscriber
implements the Subscriber
trait by never being enabled,
never being interested in any callsite, and dropping all spans and events.
Trait Implementations
sourceimpl Clone for NoSubscriber
impl Clone for NoSubscriber
sourcefn clone(&self) -> NoSubscriber
fn clone(&self) -> NoSubscriber
Returns a copy of the value. Read more
1.0.0 · sourcefn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
sourceimpl Debug for NoSubscriber
impl Debug for NoSubscriber
sourceimpl Default for NoSubscriber
impl Default for NoSubscriber
sourcefn default() -> NoSubscriber
fn default() -> NoSubscriber
Returns the “default value” for a type. Read more
sourceimpl Subscriber for NoSubscriber
impl Subscriber for NoSubscriber
sourcefn register_callsite(&self, _: &'static Metadata<'static>) -> Interest
fn register_callsite(&self, _: &'static Metadata<'static>) -> Interest
Registers a new callsite with this subscriber, returning whether or not the subscriber is interested in being notified about the callsite. Read more
sourcefn new_span(&self, _: &Attributes<'_>) -> Id
fn new_span(&self, _: &Attributes<'_>) -> Id
sourcefn record_follows_from(&self, _span: &Id, _follows: &Id)
fn record_follows_from(&self, _span: &Id, _follows: &Id)
Adds an indication that span
follows from the span with the id
follows
. Read more
sourcefn max_level_hint(&self) -> Option<LevelFilter>
fn max_level_hint(&self) -> Option<LevelFilter>
Returns the highest verbosity level that this Subscriber
will
enable, or None
, if the subscriber does not implement level-based
filtering or chooses not to implement this method. Read more
sourcefn clone_span(&self, id: &Id) -> Id
fn clone_span(&self, id: &Id) -> Id
sourcefn drop_span(&self, _id: Id)
fn drop_span(&self, _id: Id)
use Subscriber::try_close
instead
This method is deprecated. Read more
sourcefn current_span(&self) -> Current
fn current_span(&self) -> Current
Returns a type representing this subscriber’s view of the current span. Read more
impl Copy for NoSubscriber
Auto Trait Implementations
impl RefUnwindSafe for NoSubscriber
impl Send for NoSubscriber
impl Sync for NoSubscriber
impl Unpin for NoSubscriber
impl UnwindSafe for NoSubscriber
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcepub fn borrow_mut(&mut self) -> &mut T
pub fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more