Struct MetricSpec 

pub struct MetricSpec {
    pub value: String,
    pub family: Option<String>,
    pub kind: Option<MetricKind>,
    pub unit: Option<String>,
    pub format: Option<String>,
    pub cell: BTreeMap<String, String>,
}

SRD-40b §1 schema for one synthetic-metric declaration on an op template.

Fields

value: String

Required. A Polydat expression evaluated in the op’s bound scope. A bare binding name is the canonical form when the formula belongs in a bindings: block; any GK expression that produces a numeric result is also valid. See SRD-40b §4.

family: Option<String>

Optional override of the family name. Defaults to the map key on ParsedOp.metrics. SRD-40b §1.

kind: Option<MetricKind>

Optional metric type. Defaults to Gauge per SRD-40b §1.

unit: Option<String>

Optional OpenMetrics unit suffix (ms, bytes, …). When set, lands in BOTH the family-name suffix and the metric_family.unit column per SRD-40a §4.3.

format: Option<String>

Optional generation-time numeric sanitiser using Excel-style hash patterns (#.##, 0.000, etc.). Translated at registration time into a round op that runs before the value is recorded on the instrument; storage holds the sanitised number. SRD-40b §1.

cell: BTreeMap<String, String>

Optional dimensional placement: dimension name → a Polydat expression producing that dimension’s value for this sample.

A metric identity is its label set with the family name promoted into it, a closed 1:1 association. cell: therefore does not attach a label to a sample — it selects the dimensional CELL the sample belongs to, REFINING the identity its registration site already composes. One value per cell, one family per cell, and the existing duplicate-family check keeps working unchanged.

BTreeMap so synthesis order is deterministic: the coordinate’s rendering is what keys a cell, and a map that iterated differently between runs would key the same coordinate two ways.

Trait Implementations

impl Clone for MetricSpec

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MetricSpec

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MetricSpec

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for MetricSpec

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

where __S: Serializer,

Serialize this value into the given Serde serializer.