Struct Quantity 

pub struct Quantity {
    pub value: f64,
    pub dimension: Dimension,
}

A value expressed in SI base units, tagged with its physical dimension.

Fields

value: f64

Magnitude in coherent SI base units (e.g. metres, kilograms, seconds).

dimension: Dimension

Implementations

impl Quantity

pub const fn new(value: f64, dimension: Dimension) -> Self

pub const fn scalar(value: f64) -> Self

A dimensionless number.

pub fn add(&self, other: &Quantity) -> Result<Quantity, UnitsError>

Sum of two quantities — requires matching dimensions (fail closed otherwise).

pub fn sub(&self, other: &Quantity) -> Result<Quantity, UnitsError>

Difference — requires matching dimensions.

pub fn mul(&self, other: &Quantity) -> Quantity

Product — values multiply, dimensions compose.

pub fn div(&self, other: &Quantity) -> Option<Quantity>

Quotient — values divide, dimensions subtract. None on divide-by-zero.

pub fn scale(&self, factor: f64) -> Quantity

Scale by a dimensionless factor.

pub fn powi(&self, n: i32) -> Quantity

Integer power — value and dimension both raised to n.

pub fn compatible_with(&self, other: &Quantity) -> bool

true iff dimensionally compatible with other (can be added/compared).

Trait Implementations

impl Clone for Quantity

fn clone(&self) -> Quantity

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Quantity

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

Formats the value using the given formatter.

impl PartialEq for Quantity

fn eq(&self, other: &Quantity) -> 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 Copy for Quantity

impl StructuralPartialEq for Quantity