Enum Kind

#[non_exhaustive]
pub enum Kind {
    Span,
    Metric,
}

A kind of specialized diagnostic event.

If a crate::Event has a kind associated with it, it can be pulled from its props:

match evt.props().pull::<emit::Kind, _>(emit::well_known::KEY_EVT_KIND) {
    Some(emit::Kind::Span) => {
        // The event is a span
    }
    Some(emit::Kind::Metric) => {
        // The event is a metric
    }
    Some(_) => {
        // The event is an unknown kind
    }
    None => {
        // The event doesn't have a specific kind
    }
}

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Span

The event is a span in a distributed trace.

This variant is equal to EVENT_KIND_SPAN. See the crate::span module for details.

Metric

The event is a metric sample.

This variant is equal to EVENT_KIND_METRIC. See the crate::metric module for details.

Implementations

impl Kind

pub fn try_from_str(s: &str) -> Result<Self, ParseKindError>

Try parse a kind from a formatted representation.

Trait Implementations

impl Clone for Kind

fn clone(&self) -> Kind

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Kind

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

Formats the value using the given formatter.

impl Display for Kind

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

Formats the value using the given formatter.

impl FromStr for Kind

type Err = ParseKindError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl<'v> FromValue<'v> for Kind

fn from_value(value: Value<'v>) -> Option<Self>

Perform the conversion.

impl Hash for Kind

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Kind

fn eq(&self, other: &Kind) -> 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 ToValue for Kind

fn to_value(&self) -> Value<'_>

Perform the conversion.

impl Copy for Kind

impl Eq for Kind

impl StructuralPartialEq for Kind