Struct Tracestate

pub struct Tracestate(/* private fields */);

A W3C tracestate.

The role of Tracestate is to store and propagate the tracestate header. It doesn’t currently support any format-aware modification of the underlying value, nor does it parse or validate it.

Implementations

impl Tracestate

pub const fn new_raw(value: &'static str) -> Tracestate

Construct a new tracestate with the given value, without checking its validity.

This method is not unsafe. There are no safety properties tied to the validity of tracestate values. Downstream consumers may discard a tracestate value if it’s not valid.

pub const fn new_str_raw(value: Str<'static>) -> Tracestate

Construct a new tracestate with the given value, without checking its validity.

This method is not unsafe. There are no safety properties tied to the validity of tracestate values. Downstream consumers may discard a tracestate value if it’s not valid.

pub fn new_owned_raw(value: impl Into<Box<str>>) -> Tracestate

Construct a new tracestate with the given value, without checking its validity.

This method is not unsafe. There are no safety properties tied to the validity of tracestate values. Downstream consumers may discard a tracestate value if it’s not valid.

pub fn get(&self) -> &str

Get the value of this tracestate.

pub fn current() -> Self

Get the current trace state.

If no context has been set, this method will return an empty value.

pub fn push(&self) -> Frame<TraceparentCtxt>

Get a Frame that can set the current trace state in a scope.

While the frame is active, Tracestate::current will return this state.

Trait Implementations

impl Clone for Tracestate

fn clone(&self) -> Tracestate

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Tracestate

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

Formats the value using the given formatter.

impl Display for Tracestate

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

Formats the value using the given formatter.

impl PartialEq for Tracestate

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for Tracestate

impl StructuralPartialEq for Tracestate