Struct `NoSubscriber`

pub struct NoSubscriber(/* private field */);

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.

Implementations

`impl NoSubscriber`

const fn new() -> Self: Returns a new NoSubscriber.

Trait Implementations

`impl Clone for NoSubscriber`

fn clone(&self) -> NoSubscriber

`impl Copy for NoSubscriber`

`impl Debug for NoSubscriber`

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

`impl Default for NoSubscriber`

fn default() -> NoSubscriber

`impl Subscriber for NoSubscriber`

fn register_callsite(&self, &'static Metadata<'static>) -> Interest
fn new_span(&self, &Attributes<'_>) -> Id
fn event(&self, _event: &Event<'_>)
fn record(&self, _span: &Id, _values: &Record<'_>)
fn record_follows_from(&self, _span: &Id, _follows: &Id)
fn enabled(&self, _metadata: &Metadata<'_>) -> bool
fn enter(&self, _span: &Id)
fn exit(&self, _span: &Id)

Auto Trait Implementations

`impl Freeze for NoSubscriber`

`impl RefUnwindSafe for NoSubscriber`

`impl Send for NoSubscriber`

`impl Sync for NoSubscriber`

`impl Unpin for NoSubscriber`

`impl UnsafeUnpin for NoSubscriber`

`impl UnwindSafe for NoSubscriber`

Blanket Implementations

`impl<T> Any for NoSubscriber where T: 'static + ?Sized,`

fn type_id(&self) -> TypeId

`impl<T> Borrow<T> for NoSubscriber where T: ?Sized,`

fn borrow(&self) -> &T

`impl<T> BorrowMut<T> for NoSubscriber where T: ?Sized,`

fn borrow_mut(&mut self) -> &mut T

`impl<T> CloneToUninit for NoSubscriber where T: Clone,`

unsafe fn clone_to_uninit(&self, dest: *mut u8)

`impl<T> From<T> for NoSubscriber`

fn from(t: T) -> T: Returns the argument unchanged.

`impl<T> ToOwned for NoSubscriber where T: Clone,`

type Owned = T;
fn to_owned(&self) -> T
fn clone_into(&self, target: &mut T)

`impl<T, U> Into for NoSubscriber where U: From<T>,`

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of [From]<T> for U chooses to do.

`impl<T, U> TryFrom for NoSubscriber where U: Into<T>,`

type Error = Infallible;
fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

`impl<T, U> TryInto for NoSubscriber where U: TryFrom<T>,`

type Error = >::Error;
fn try_into(self) -> Result<U, >::Error>