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

• [x] Parser for UCUM complex units
• [x] Semantics of standard units
• [x] Semantics of special units
• [ ] Semantics of arbitrary units

Unit tables

• [x] Table 1: prefix symbols
• [x] Table 2: base units
• [x] Table 3: dimensionless units
• [x] Table 4: SI units
• [x] 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.