b10 0.2.0

Decimal Numbers For The Rust Programming Language

The API provides a light-weight alternative to arbitrary-precision arithmetic. The const generics for base-ten exponents fix the computation steps involved at compile time. You basicaly get the speed of 64-bit primitives combined with the safety from big-number implementations.

let cents = b10::BaseCount::<-2>::from(199);
assert_eq!("€ 1.99", format!("€ {cents}"));

Parsing, formatting and calculation all is losses by design (unless explicitly stated otherwise in the method name).

// metric prefixes
use b10::{Milli, Nano, Pico};

// instantiate SI units
let mA = Milli::from(100);
let ns = Nano::from(4);

// multiply into another base
let (pC, overflow):(Pico, Pico) = mA.product(ns);
if overflow != Pico::ZERO {
    panic!("product exceeds 2⁶⁴ − 1 pico");
}

// pretty formatting options
assert_eq!("100E-3 × 4E-9 = 400E-12",
    format!("{mA:E} × {ns:E} = {pC:E}"));

This is free and unencumbered software released into the public domain.