Struct Span

pub struct Span { /* private fields */ }

Available on crate feature tracing only.

An entered span which will exit on drop.

Implementations

impl Span

pub fn new( level: Level, meta: &'static Metadata<'static>, values: &ValueSet<'_>, ) -> Self

Create a new span.

This constructor is typically invoked by the crate::span! macro.

pub fn record<V>(&self, field: &str, value: V) -> &Self

where V: Value,

Record a single field to take value.

Panics

If the field name wasn’t mentioned when the span was created.

impl Span

pub fn into_scope<T>(self, f: impl FnOnce() -> T) -> T

Execute f in with this span active, consuming it.

Trait Implementations

impl Clone for Span

fn clone(&self) -> Span

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Drop for Span

fn drop(&mut self)

Executes the destructor for this type.