Struct raystack::Number

pub struct Number { /* fields omitted */ }

A Haystack Number, encapsulating a scalar value and an optional unit value. The unit is represented as a string.

Methods

impl Number

pub fn new(value: f64, unit: Option<String>) -> Self

Create a new Number. If present, the unit should be a valid unit string from Project Haystack's unit database.

pub fn value(&self) -> f64

Return the numeric component of this Number.

pub fn unit(&self) -> Option<&str>

Return the unit component of this Number, if present.

pub fn from_encoded_json_string(
    json_string: &str
) -> Result<Self, ParseNumberError>

Parse a Number from a number encoded in a JSON string.

Example

use raystack::Number;

let n = Number::new(1.0, Some("pH".to_owned()));
assert_eq!(Number::from_encoded_json_string("n:1.0 pH").unwrap(), n);

Trait Implementations

impl Clone for Number

fn clone(&self) -> Number

Returns a copy of the value.

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

Performs copy-assignment from source.

impl PartialEq<Number> for Number

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl Debug for Number

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

Formats the value using the given formatter.