Struct `Current`

pub struct Current { /* private fields */ }

Indicates what the Subscriber considers the "current" span.

As subscribers may not track a notion of a current span, this has three possible states:

"unknown", indicating that the subscriber does not track a current span,
"none", indicating that the current context is known to not be in a span,
"some", with the current span's Id and Metadata.

Implementations

`impl Current`

fn new(id: Id, metadata: &'static Metadata<'static>) -> Self

Constructs a new Current that indicates the current context is a span with the given metadata and metadata.

fn none() -> Self

Constructs a new Current that indicates the current context is not in a span.

fn is_known(&self) -> bool

Returns true if the Subscriber that constructed this Current tracks a current span.

If this returns true and id, metadata, or into_inner return None, that indicates that we are currently known to not be inside a span. If this returns false, those methods will also return None, but in this case, that is because the subscriber does not keep track of the currently-entered span.

fn into_inner(self) -> Option<(Id, &'static Metadata<'static>)>

Consumes self and returns the span Id and Metadata of the current span, if one exists and is known.

fn id(&self) -> Option<&Id>

Borrows the Id of the current span, if one exists and is known.

fn metadata(&self) -> Option<&'static Metadata<'static>>

Borrows the Metadata of the current span, if one exists and is known.

Trait Implementations

`impl Debug for Current`

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

Auto Trait Implementations

`impl !RefUnwindSafe for Current`

`impl !UnwindSafe for Current`

`impl Freeze for Current`

`impl Send for Current`

`impl Sync for Current`

`impl Unpin for Current`

`impl UnsafeUnpin for Current`

Blanket Implementations

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

`impl<T> From<T> for Current`

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

`impl<T, U> Into for Current 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 Current where U: Into<T>,`

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

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

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