Struct Span 

pub struct Span { /* private fields */ }

The owner of one running span. Finish it after its instrumented calls return; dropping it unfinished, including during unwinding, records Abandoned.

Implementations

impl Span

pub fn id(&self) -> SpanId

This span’s identity.

pub fn child(&self, task: impl Into<String>, kind: SpanKind) -> Span

Start a nested span, such as a callback, queue wait, or host suspension.

pub fn instrument<T>(&self, value: T) -> Instrumented<T>

Wrap a stop policy or progress sink so that its calls are recorded in this span, at their original call sites.

pub fn finish(self, outcome: Outcome)

Record how the span ended. Wrappers keep working afterwards but stop recording.

Trait Implementations

impl Debug for Span

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

Formats the value using the given formatter.

impl Drop for Span

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.