Enum MetricKind 

#[non_exhaustive]
#[repr(i32)]
pub enum MetricKind {
    Unspecified = 0,
    Counter = 1,
    Gauge = 2,
    Histogram = 3,
}

Metric type for a MEASUREMENT field. See 12-schema-and-codegen.md § 2.

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.

Counter = 1

Monotonically increasing counter (e.g. bytes_out, request_count).

Gauge = 2

Last-write-wins gauge (e.g. queue_depth, in_flight).

Histogram = 3

Histogram with explicit bucket bounds (e.g. latency_ms).

Implementations

impl MetricKind

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

Stable string label.

Trait Implementations

impl Clone for MetricKind

fn clone(&self) -> MetricKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MetricKind

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

Formats the value using the given formatter.

impl Default for MetricKind

fn default() -> MetricKind

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for MetricKind

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Enumeration for MetricKind

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

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<MetricKind>

Look up a variant by its protobuf name string.

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

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

impl FromStr for MetricKind

type Err = UnknownVariant

The associated error which can be returned from parsing.

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

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

impl Hash for MetricKind

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 MetricKind

fn eq(&self, other: &MetricKind) -> 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 MetricKind

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 MetricKind

impl Eq for MetricKind

impl StructuralPartialEq for MetricKind