Enum NumericUnit 

pub enum NumericUnit {
    Mass(Decimal, MassUnit),
    Length(Decimal, LengthUnit),
    Volume(Decimal, VolumeUnit),
    Duration(Decimal, DurationUnit),
    Temperature(Decimal, TemperatureUnit),
    Power(Decimal, PowerUnit),
    Force(Decimal, ForceUnit),
    Pressure(Decimal, PressureUnit),
    Energy(Decimal, EnergyUnit),
    Frequency(Decimal, FrequencyUnit),
    Data(Decimal, DataUnit),
    Money(Decimal, MoneyUnit),
}

A unified type for all numeric units (physical quantities and money)

This provides consistent behavior for all unit types:

• Comparisons always compare numeric values (ignoring units)
• Same-unit arithmetic preserves the unit
• Cross-unit arithmetic produces dimensionless numbers

Variants

Mass(Decimal, MassUnit)

Length(Decimal, LengthUnit)

Volume(Decimal, VolumeUnit)

Duration(Decimal, DurationUnit)

Temperature(Decimal, TemperatureUnit)

Power(Decimal, PowerUnit)

Force(Decimal, ForceUnit)

Pressure(Decimal, PressureUnit)

Energy(Decimal, EnergyUnit)

Frequency(Decimal, FrequencyUnit)

Data(Decimal, DataUnit)

Money(Decimal, MoneyUnit)

Implementations

impl NumericUnit

pub fn value(&self) -> Decimal

Extract the numeric value from any unit

pub fn same_category(&self, other: &NumericUnit) -> bool

Check if two units are the same category

pub fn with_value(&self, new_value: Decimal) -> NumericUnit

Create a new NumericUnit with the same unit type but different value This is the key method that eliminates type enumeration in operations

pub fn validate_same_currency( &self, other: &NumericUnit, ) -> Result<(), LemmaError>

Validate that two Money units have the same currency Returns Ok for non-Money units or matching currencies

Trait Implementations

impl Clone for NumericUnit

fn clone(&self) -> NumericUnit

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NumericUnit

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

Formats the value using the given formatter.

impl Display for NumericUnit

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

Formats the value using the given formatter.

impl PartialEq for NumericUnit

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

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for NumericUnit