Enum Kind 

#[non_exhaustive]
pub enum Kind {
    Plain,
    AbsoluteTemperature,
    TemperatureDifference,
    GaugePressure,
    NormalVolume,
    StandardVolume,
}

The kind of a quantity on top of its dimension.

Two units with the same dimension but different kinds (for example degC and delta_degC) are not interchangeable: a conversion between them is refused with Error::KindMismatch. A temperature point (degC) converts to another point (K), and a temperature difference (delta_degF) converts to another difference (delta_K). dimvexa does not add or subtract quantities (ADR-014), so a kind has no arithmetic.

Examples

use dimvexa_core::Kind;

assert_eq!(Kind::from_name("absolute_temperature"), Some(Kind::AbsoluteTemperature));
assert_eq!(Kind::TemperatureDifference.name(), "temperature_difference");

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Plain

An ordinary quantity without special rules.

AbsoluteTemperature

A point on a temperature scale (K, degC, degF, degR).

TemperatureDifference

An interval between two temperatures (delta_K, delta_degC, …).

GaugePressure

A pressure read relative to the (unspecified) ambient pressure: psig, barg, Pag (ADR-013). It converts only to another gauge unit.

NormalVolume

A gas volume at the normal state of DIN 1343 (273.15 K, 101 325 Pa): Nm3 (ADR-013).

StandardVolume

A gas volume at 60 degF and 14.696 psia: scf (ADR-013).

Implementations

impl Kind

pub const fn is_reference(self) -> bool

True for a kind that is tied to a stated reference state (ADR-013). Such a unit converts only to a unit of the same kind, and the kind survives in compound units (Nm3/h keeps the reference of Nm3).

pub const fn name(self) -> &'static str

The stable lower-case name used in data files and JSON output.

pub fn from_name(name: &str) -> Option<Self>

Reads a name produced by Kind::name.

Trait Implementations

impl Clone for Kind

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Kind

impl Debug for Kind

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

Formats the value using the given formatter.

impl Default for Kind

fn default() -> Self

Returns the “default value” for a type.

impl Display for Kind

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

Formats the value using the given formatter.

impl Eq for Kind

impl Hash for Kind

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 Kind

fn eq(&self, other: &Self) -> bool

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Kind