README.md

Float Format

This is a crate for customizing the format of floating point numbers. This crate is still work in progress, many features are still to be added.

So far everything is unstable.

use float_format::*;

fn main() {
    // Create with a custom format and parse from a string.
    let float = Float::from_str(
        Format::new_ieee_excess(16, 64),
        "123456.789012345",
    ).unwrap();

    // Format the float with custom precision.
    assert_eq!(format!("{:.8}", float), "123456.78901234");

    // Convert from primitive float types.
    assert_eq!(Float::from(0.2f32).to_f32(), 0.2f32);
    assert_eq!(Float::from(0.2f64).to_f64(), 0.2f64);
}