Struct LogosQuantity 

pub struct LogosQuantity {
    pub q: Quantity,
    pub unit: Unit,
}

A physical quantity on the compiled-to-Rust path — the AOT mirror of the interpreter’s Quantity value. The magnitude rides the exact rational tower (no float drift) and the display unit travels with it so Show renders faithfully (42/127 ft). + − require the same dimension — the front-end’s type checker proves this, so a mismatch is a compile error, not a runtime one; the runtime check here is a defensive backstop. × ÷ combine dimensions, and a quantity may be scaled by a dimensionless number (unit preserved).

Fields

q: Quantity

unit: Unit

Implementations

impl LogosQuantity

pub fn of(value: i64, unit_name: &str) -> Self

value of the named unit (LogosQuantity::of(2, "inch")).

pub fn from_rational(value: LogosRational, unit_name: &str) -> Self

An exact-rational magnitude of the named unit. Panics on an unknown unit, which the front-end has already rejected before codegen.

pub fn add(&self, other: &LogosQuantity) -> LogosQuantity

pub fn sub(&self, other: &LogosQuantity) -> LogosQuantity

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

× ÷ combine dimensions; the result is shown in SI/dimension form (empty display unit).

pub fn div_exact(&self, other: &LogosQuantity) -> LogosQuantity

pub fn scale(&self, k: &LogosRational) -> LogosQuantity

Scale by a dimensionless number (unit preserved): q * k.

pub fn scale_int(&self, k: i64) -> LogosQuantity

Scale by a dimensionless integer (unit preserved) — the common q * 3 case from codegen.

pub fn div_int(&self, k: i64) -> LogosQuantity

Divide by a dimensionless integer (unit preserved) — the common q / 2 case from codegen.

pub fn div_scalar(&self, k: &LogosRational) -> LogosQuantity

Divide by a dimensionless number (unit preserved): q / k.

pub fn convert(&self, unit_name: &str) -> LogosQuantity

Re-express in another unit of the SAME dimension. A different dimension is the forbidden cast — the type checker rejects it, so this panic is a defensive backstop.

Trait Implementations

impl Clone for LogosQuantity

fn clone(&self) -> LogosQuantity

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LogosQuantity

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

Formats the value using the given formatter.

impl Display for LogosQuantity

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

Formats the value using the given formatter.

impl PartialEq for LogosQuantity

fn eq(&self, other: &Self) -> 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 PartialOrd for LogosQuantity

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for LogosQuantity