Struct Metric 

pub struct Metric<T, I, Raw, M, F> { /* private fields */ }

A scoring operator built via the measure().by() → map01().by() pipeline.

Stores two closures:

• measure: Fn(I) -> Raw — maps input to an intermediate raw value.
• map01: Fn(&Raw, I) -> Witnessed<T, Value01> — maps the raw value back alongside the original input to a validated [0, 1] score.

eval(input) composes the two closures.

Implementations

impl<T: Float, I, Raw, M, F> Metric<T, I, Raw, M, F>

where M: Fn(&I) -> Raw, F: Fn(&Raw, &I) -> Witnessed<T, Value01>,

pub fn eval(&self, input: &I) -> Witnessed<T, Value01>

Evaluate this metric against an input, producing a [0, 1] score.

pub fn name(&self) -> &str

Return the metric’s name.

impl<T: Float, I: 'static, Raw: 'static, M, F> Metric<T, I, Raw, M, F>

where M: Fn(&I) -> Raw + 'static, F: Fn(&Raw, &I) -> Witnessed<T, Value01> + 'static,

pub fn boxed(self) -> Box<dyn Scorable<T, I>>

Box this metric as a Box<dyn Scorable<T, I>> for use in DynamicScoreSet.

This is a convenience over Box::new(metric) — it infers the Scorable type automatically, avoiding an explicit annotation.

Trait Implementations

impl<T, I, Raw, M: Clone, F: Clone> Clone for Metric<T, I, Raw, M, F>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T, I, Raw, M, F> Scorable<T, I> for Metric<T, I, Raw, M, F>

where T: Float, M: Fn(&I) -> Raw, F: Fn(&Raw, &I) -> Witnessed<T, Value01>,

fn eval(&self, input: &I) -> Witnessed<T, Value01>

Evaluate this metric against an input, producing a [0, 1] score.

fn name(&self) -> &str

Return the metric’s name.