Struct MeasureUnit 

pub struct MeasureUnit {
    pub name: String,
    pub factor: RationalInteger,
    pub derived_measure_factors: Vec<(String, i32)>,
    pub decomposition: BTreeMap<String, i32>,
    pub minimum: Option<RationalInteger>,
    pub maximum: Option<RationalInteger>,
    pub default_magnitude: Option<RationalInteger>,
}

A single unit within a Measure type.

factor is the conversion factor: 1 of this unit equals factor canonical units. derived_measure_factors stores (measure_ref, exponent) pairs from compound unit declarations (e.g., meter/second produces [("meter", 1), ("second", -1)]). Empty for base units. decomposition is the dimensional decomposition vector, populated during the planning decomposition pass. It is empty until that pass completes.

Fields

name: String

factor: RationalInteger

Conversion factor: 1 of this unit equals value canonical units.

derived_measure_factors: Vec<(String, i32)>

decomposition: BTreeMap<String, i32>

minimum: Option<RationalInteger>

Minimum magnitude in this unit (schema/UI); canonical bound is on the type.

maximum: Option<RationalInteger>

Maximum magnitude in this unit (schema/UI).

default_magnitude: Option<RationalInteger>

Default suggestion magnitude in this unit (schema/UI).

Implementations

impl MeasureUnit

pub fn from_decimal_factor( name: String, decimal_factor: Decimal, derived_measure_factors: Vec<(String, i32)>, ) -> Result<Self, String>

pub fn clear_constraint_magnitudes(&mut self)

pub fn is_canonical_factor(&self) -> bool

pub fn is_positive_factor(&self) -> bool

pub fn factor_decimal(&self) -> Decimal

Conversion factor as decimal (schema unit factors always commit).

pub fn minimum_decimal(&self) -> Option<Decimal>

pub fn maximum_decimal(&self) -> Option<Decimal>

pub fn default_magnitude_decimal(&self) -> Option<Decimal>

pub fn maximum_canonical_decimal(&self) -> Option<Decimal>

Maximum bound lifted to canonical units via maximum * factor.

impl MeasureUnit

pub fn with_decomposition(self, decomposition: BTreeMap<String, i32>) -> Self

pub fn with_factor(self, factor: RationalInteger) -> Self

pub fn with_derived_measure_factors( self, derived_measure_factors: Vec<(String, i32)>, ) -> Self

Trait Implementations

impl Clone for MeasureUnit

fn clone(&self) -> MeasureUnit

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MeasureUnit

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MeasureUnit

fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer.

impl Eq for MeasureUnit

impl Hash for MeasureUnit

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for MeasureUnit

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

fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for MeasureUnit