Enum Confidence 

pub enum Confidence {
    High,
    Medium,
    Low,
}

Qualitative confidence band derived from the probabilistic MatchResult::score.

The bands are fixed across all MatchConfig presets — they do not follow match_threshold. They are intended for triage UIs and audit logs where a coarse High/Medium/Low summary is more useful than the raw float. The is_match boolean remains the authoritative go/no-go signal because it incorporates the configured threshold.

Boundaries (per spec §12.5):

Score range	Band
score >= 0.90	High
0.75 <= score < 0.90	Medium
score < 0.75	Low

Examples

use worker_matcher::Confidence;

assert_eq!(Confidence::from_score(0.99), Confidence::High);
assert_eq!(Confidence::from_score(0.90), Confidence::High);   // inclusive
assert_eq!(Confidence::from_score(0.85), Confidence::Medium);
assert_eq!(Confidence::from_score(0.75), Confidence::Medium); // inclusive
assert_eq!(Confidence::from_score(0.50), Confidence::Low);
assert_eq!(Confidence::from_score(0.00), Confidence::Low);

Variants

High

Score is at or above 0.90. Strong match; safe to act on with minimal review.

Medium

Score is in 0.75..0.90. Medium-confidence match; the per-field MatchBreakdown should be inspected before clinical use.

Low

Score is below 0.75. Treat as a candidate at best; require additional evidence before treating as the same worker.

Implementations

impl Confidence

pub fn from_score(score: f64) -> Self

Bucket a probabilistic score into one of the three bands.

The function is total over f64: NaN inputs degrade to Low, negative scores degrade to Low, scores above 1.0 are treated as High. In practice the matcher only ever produces values in [0.0, 1.0], so callers shouldn’t encounter the degenerate inputs.

use worker_matcher::Confidence;

assert_eq!(Confidence::from_score(f64::NAN), Confidence::Low);
assert_eq!(Confidence::from_score(-0.5),     Confidence::Low);
assert_eq!(Confidence::from_score(2.0),      Confidence::High);

Trait Implementations

impl Clone for Confidence

fn clone(&self) -> Confidence

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Confidence

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Confidence

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Confidence

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

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for Confidence

impl Eq for Confidence

impl StructuralPartialEq for Confidence