Enum MetricTagMode 

pub enum MetricTagMode {
    Single,
    Full,
    Auto,
}

How metric tags are exposed to and accepted from VRL or Lua.

Variants

Single

Tags are exposed as single strings (last value wins for multi-value tags); writes always produce single-value tags.

Full

Tags are always exposed as arrays; writes always produce multi-value tags regardless of whether the assigned value is scalar or array.

Auto

Tags are exposed using their underlying shape: single-value tags as strings, multi-value tags as arrays. Writes: scalar values produce single-value tags; arrays of length >= 2 produce multi-value tags.

A length-1 array is normalised to a single-value tag by the metric storage layer (TagValueSet::Set is never reduced below 2 elements), so an assignment like .tags.region = ["us-east-1"] round-trips as a scalar on the next read. Use Full to force array shape regardless of length.

Trait Implementations

impl Clone for MetricTagMode

fn clone(&self) -> MetricTagMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MetricTagMode

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

Formats the value using the given formatter.

impl Default for MetricTagMode

fn default() -> MetricTagMode

Returns the “default value” for a type.

impl PartialEq for MetricTagMode

fn eq(&self, other: &MetricTagMode) -> 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 Copy for MetricTagMode

impl Eq for MetricTagMode

impl StructuralPartialEq for MetricTagMode