[][src]Crate unicode_reader

This crate provides adaptors which wrap byte-oriented readers and yield the UTF-8 data as Unicode code points or grapheme clusters.

Unlike other Unicode parsers which work on strings (e.g. unicode_segmentation upon which this is built), this crate works on streams and doesn't require reading the entire data into memory. Instead it yields the graphemes or code points as it reads them.


extern crate unicode_reader;
use unicode_reader::{CodePoints, Graphemes};

use std::io::Cursor;

fn main() {
    let input = Cursor::new("He\u{302}\u{320}llo");
    let mut graphemes = Graphemes::from(input);
    assert_eq!("H",                 graphemes.next().unwrap().unwrap());
    assert_eq!("e\u{302}\u{320}",   graphemes.next().unwrap().unwrap()); // note 3 characters
    assert_eq!("l",                 graphemes.next().unwrap().unwrap());
    assert_eq!("l",                 graphemes.next().unwrap().unwrap());
    assert_eq!("o",                 graphemes.next().unwrap().unwrap());

    let greek_bytes = vec![0xCE, 0xA7, 0xCE, 0xB1, 0xCE, 0xAF, 0xCF, 0x81, 0xCE, 0xB5,
                           0xCF, 0x84, 0xCE, 0xB5];
    let mut codepoints = CodePoints::from(Cursor::new(greek_bytes));
    assert_eq!(vec!['Χ', 'α', 'ί', 'ρ', 'ε', 'τ', 'ε'],
                codepoints.map(|r| r.unwrap())





An error raised when parsing a UTF-8 byte stream fails.


Wraps a byte-oriented reader and yields the UTF-8 data one code point at a time. Any UTF-8 parsing errors are raised as io::Error with ErrorKind::InvalidData.


Wraps a char-oriented reader and yields the data one Unicode grapheme cluster at a time.