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Unicode character composition and decomposition utilities as described in Unicode Standard Annex #15.

This crate requires Rust 1.36+.

extern crate unicode_normalization;

use unicode_normalization::char::compose;
use unicode_normalization::UnicodeNormalization;

fn main() {
    assert_eq!(compose('A','\u{30a}'), Some('Å'));

    let s = "ÅΩ";
    let c = s.nfc().collect::<String>();
    assert_eq!(c, "ÅΩ");


You can use this package in your project by adding the following to your Cargo.toml:

unicode-normalization = "0.1.19"

no_std + alloc support

This crate is completely no_std + alloc compatible. This can be enabled by disabling the std feature, i.e. specifying default-features = false for this crate on your Cargo.toml.