Struct Answer 

#[non_exhaustive]
pub struct Answer {
    pub value: AnswerValue,
    pub probabilities: BTreeMap<String, f32>,
    pub confidence: f32,
    pub model: Option<String>,
}

One answer: the value decided, the probability mass per label, and the probability of the value that came back.

#[non_exhaustive], so an adapter builds one with Answer::new or the three conveniences rather than a struct literal, and a field added later is not a breaking change for every adapter.

Answer::confidence is not comparable across adapters — see Calibration.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

value: AnswerValue

The value decided, matching the shape of the Question asked.

probabilities: BTreeMap<String, f32>

Probability mass per label, keyed as Question::labels names them. The port does not require the masses to sum to one: some providers report only a top-1.

confidence: f32

Probability of the label in value. See Calibration — not comparable across adapters.

model: Option<String>

The vendor-reported model version that produced this answer, when the adapter knows it. An alias (jev-latest) can move under an unchanged request, and a threshold was tuned against a specific version’s numbers — the version that actually answered is how a drifted answer is traced back to its cause. None when the adapter does not know (or its port has no such report); set with Answer::with_model.

Implementations

impl Answer

pub fn new( value: AnswerValue, probabilities: BTreeMap<String, f32>, confidence: f32, ) -> Self

An answer with the value, probabilities and confidence given. The conveniences below are the usual way in: they pick confidence out of probabilities themselves.

pub fn with_model(self, model: impl Into<String>) -> Self

Records the vendor-reported model version that produced this answer, for the adapters whose vendor reports one. Chainable on any constructor: Answer::noul(..).with_model("jev-1.13.0").

pub fn choice( label: impl Into<String>, probabilities: BTreeMap<String, f32>, ) -> Self

An answer to a Question::Choice: label is one of its criteria, and confidence is looked up in probabilities under it — 0.0 when the label is absent.

pub fn score(value: f32, probabilities: BTreeMap<String, f32>) -> Self

An answer to a Question::Score: value is on the scale, and confidence is looked up in probabilities under the score’s own name — the convention when a scale’s levels are named for their scores ("1".."5"). A provider that reports confidence another way builds the answer with Answer::new instead. 0.0 when the label is absent.

pub fn noul(value: bool, probabilities: BTreeMap<String, f32>) -> Self

An answer to a Question::Noul: confidence is looked up in probabilities under "true" or "false" — 0.0 when the label is absent.

Trait Implementations

impl Clone for Answer

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 Answer

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

Formats the value using the given formatter.

impl PartialEq for Answer

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Answer