unicode_reader

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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 (for instance, 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.

```rust extern crate unicodereader; use unicodereader::Graphemes;

use std::io::Cursor;

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

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())
                      .collect::<Vec<char>>());

} ```