Crate ucum

UCUM is the Unified Code for Units of Measure.

This crate is a (partial) implementation of the revision 442 of the UCUM specification.

Quick start

use ucum::prelude::*;

let system = UnitSystem::<f64>::default();
let q1 = system.parse("35.5 km/h")?;
let q2 = system.parse("1.1e1 m.s-1")?;
assert!(q1 < q2);
assert!(2*q1 > q2);

Implementation status

Syntax and semantics

• Parser for UCUM complex units
• Semantics of standard units
• Semantics of special units
• Semantics of arbitrary units

Unit tables

• Table 1: prefix symbols
• Table 2: base units
• Table 3: dimensionless units
• Table 4: SI units
• Table 5: Other units from ISO 1000, ISO 2955, and some from ANSI X3.50
• Table 6: Natural units
• Table 7: CGS units
• Table 8: International customary units
• Table 9: Older U.S. “survey” lengths (also called “statute” lengths)
• Table 10: British Imperial lengths
• Table 11: U.S. volumes including so called “dry measures”
• Table 12: British Imperial volumes
• Table 13: Avoirdupois weights
• Table 14: Troy weights
• Table 15: Apothecaries’ weights
• Table 16: Units used in typesetting
• Table 17: Other Units for Heat and Temperature
• Table 18: Units Used Predominantly in Clinical Medicine
• Table 19: Units used in Chemical and Biomedical Laboratories
• Table 20: Levels
• Table 21: Miscellaneous Units
• Table 22: Units used in Information Science and Technology
• Table 23: The special prefix symbols for powers of 2

Misc

• Full crate documentation

Modules

• ast
  Abstract Syntax Tree for UCUM units.
• dimension
  Representation of the dimension of units and quantities.
• error
  Error type for this crate.
• parser
  Parser for UCUM units and UCUM quantities (i.e. value + unit).
• prelude
  Re-exports most useful symbols from the ucum crate.
• quantity
  A Quantity has a magnitude and a dimension.
• special
  Special units conversion funcions. See http://unitsofmeasure.org/ucum.html#section-Special-Units-on-non-ratio-Scales
• system
  This module initializes the tables of all UCUM units.