Struct HsRule 

pub struct HsRule {
    pub cas: &'static str,
    pub shape: ShapePattern,
    pub purity_range: Option<RangeInclusive<f64>>,
    pub hs_code: &'static str,
    pub heading_description: &'static str,
    pub confidence: f32,
}

A single HS classification rule for a known CAS number.

Rules are stored in a &'static [HsRule] slice embedded at compile time, so zero heap allocation is needed at runtime.

Fields

cas: &'static str

CAS registry number (e.g. "1310-73-2").

shape: ShapePattern

Required physical form for this rule to match.

purity_range: Option<RangeInclusive<f64>>

Optional purity constraint (w/w%). None = no constraint.

hs_code: &'static str

Six-digit HS 2022 code (no dots, e.g. "281511").

heading_description: &'static str

Human-readable description of the HS heading.

confidence: f32

Confidence score (0.0–1.0) for this rule.

Trait Implementations

impl Debug for HsRule

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

Formats the value using the given formatter.