Struct CausalParent 

pub struct CausalParent { /* private fields */ }

Portable causal parent captured from a runtime’s current span context.

The token is plain data: pass it across crate, thread, or spawn boundaries and attach it with span_with_parent or instrument_future_with_parent where thread-local propagation cannot reach. A token only applies inside the runtime it was captured from; elsewhere the span records as a root.

Implementations

impl CausalParent

pub const fn context_id(self) -> u64

Process-local identity of the runtime this token was captured from.

pub const fn span_id(self) -> u64

Parent span identifier, or zero when captured outside any span.

pub const fn is_root(self) -> bool

Whether this token names the runtime root instead of a live span.

Trait Implementations

impl Clone for CausalParent

fn clone(&self) -> CausalParent

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CausalParent

impl Debug for CausalParent

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

Formats the value using the given formatter.

impl Eq for CausalParent

impl PartialEq for CausalParent

fn eq(&self, other: &CausalParent) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for CausalParent