Struct Metric32 

pub struct Metric32<C, F = fn(&C) -> f32> {
    pub name: &'static str,
    /* private fields */
}

A single named scoring metric with its normalization strategy.

Metric32<C, F> combines a measure closure F: Fn(&C) -> f32 with a Map0132 normalization. The default F = fn(&C) -> f32 keeps backward compatibility for fn-pointer metrics used with [ScoreSet32].

Use capturing closures for partial application (e.g. thresholds, config parameters), then combine heterogeneous metrics via the [score_set32!] macro.

Fields

name: &'static str

Human-readable name for this metric.

Implementations

impl<C, F: Fn(&C) -> f32> Metric32<C, F>

pub fn eval(&self, ctx: &C) -> Result<Witnessed<f32, Value01>, &'static str>

Evaluate this metric against a context.

Returns the normalized score in [0, 1], witnessed by Value01.

pub fn make_breakdown(&self, weight: f32, ctx: &C) -> Breakdown32

Produce a single Breakdown32 row for this metric.

Evaluates the measure closure and normalization against ctx, then packs the result together with the given weight into a breakdown row.

This is pub (not pub(crate)) because the #[macro_export] [score_set32!] macro expands in the caller’s crate — $crate items must be fully public to be accessible across crate boundaries.

Trait Implementations

impl<C, F: Clone> Clone for Metric32<C, F>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.