Enum FieldKind 

#[non_exhaustive]
#[repr(i32)]
pub enum FieldKind {
    Unspecified = 0,
    Label = 1,
    Attribute = 2,
    Measurement = 3,
    TraceId = 4,
    SpanId = 5,
    ParentSpanId = 6,
    TimestampNs = 7,
    DurationNs = 8,
    Forensic = 9,
}

Role of a field on a wide event. Drives codegen, OTel mapping, and lints.

See 10-data-model.md § 4.

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.

Unspecified = 0

Never appears in a well-formed schema.

Label = 1

Bounded dimension; safe as metric/span attribute.

Attribute = 2

Free-form; never a metric dimension; in log/span body.

Measurement = 3

Numeric; emitted as a metric data point.

TraceId = 4

Lifted to envelope trace_id.

SpanId = 5

Lifted to envelope span_id.

ParentSpanId = 6

Lifted to envelope parent_span_id.

TimestampNs = 7

Overrides envelope ts_ns.

DurationNs = 8

Drives span start/end derivation.

Forensic = 9

Opaque blob; never indexed; size-capped.

Implementations

impl FieldKind

pub const fn as_str(self) -> &'static str

Stable string label.

pub const fn is_envelope_lifted(self) -> bool

True if a value of this kind is lifted from the typed payload to a dedicated envelope slot (per 10-data-model.md § 6).

Trait Implementations

impl Clone for FieldKind

fn clone(&self) -> FieldKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FieldKind

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

Formats the value using the given formatter.

impl Default for FieldKind

fn default() -> FieldKind

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for FieldKind

fn deserialize<__D>( __deserializer: __D, ) -> Result<FieldKind, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Enumeration for FieldKind

fn from_i32(value: i32) -> Option<FieldKind>

Convert from an i32 wire value to the enum.

fn to_i32(&self) -> i32

Convert the enum to its i32 wire value.

fn proto_name(&self) -> &'static str

The name of this enum variant as it appears in the .proto file.

fn from_proto_name(name: &str) -> Option<FieldKind>

Look up a variant by its protobuf name string.

fn values() -> &'static [FieldKind]

All known variants of this enum, in proto declaration order.

impl From<FieldKind> for FieldRole

fn from(k: FieldKind) -> Self

Converts to this type from the input type.

impl FromStr for FieldKind

type Err = UnknownVariant

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<FieldKind, <FieldKind as FromStr>::Err>

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

impl Hash for FieldKind

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

where __H: Hasher,

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 FieldKind

fn eq(&self, other: &FieldKind) -> 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 Serialize for FieldKind

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for FieldKind

impl Eq for FieldKind

impl StructuralPartialEq for FieldKind