ukraine 1.1.0

Glory to Ukraine. Library for transliterating Ukrainian Cyrillic text into Latin script representation
Documentation 
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/// Utilities for working with Ukrainian Latin transliteration schemes.
///
/// https://uk.wikipedia.org/wiki/%D0%90%D0%B1%D0%B5%D1%86%D0%B0%D0%B4%D0%BB%D0%BE
/// https://en.wikipedia.org/wiki/Abecad%C5%82o
///
const LOZYNSKY_RULES: &[(&str, &str)] = &[
    // Softened consonant clusters must be matched first.
    ("Дь", "Ď"),
    ("дь", "ď"),
    ("Ль", "L"),
    ("ль", "l"),
    ("Нь", "Ń"),
    ("нь", "ń"),
    ("Рь", "R’"),
    ("рь", "r’"),
    ("Сь", "Ś"),
    ("сь", "ś"),
    ("Ть", "Ť"),
    ("ть", "ť"),
    ("Ць", "Ć"),
    ("ць", "ć"),
    ("Зь", "Ź"),
    ("зь", "ź"),
    // Single letters.
    ("А", "A"),
    ("а", "a"),
    ("Б", "B"),
    ("б", "b"),
    ("В", "W"),
    ("в", "w"),
    ("Г", "H"),
    ("г", "h"),
    ("Ґ", "G"),
    ("ґ", "g"),
    ("Д", "D"),
    ("д", "d"),
    ("Е", "E"),
    ("е", "e"),
    ("Є", "Je"),
    ("є", "je"),
    ("Ж", "Ż"),
    ("ж", "ż"),
    ("З", "Z"),
    ("з", "z"),
    ("И", "Y"),
    ("и", "y"),
    ("І", "I"),
    ("і", "i"),
    ("Ї", "Ji"),
    ("ї", "ji"),
    ("Й", "J"),
    ("й", "j"),
    ("К", "K"),
    ("к", "k"),
    ("Л", "Ł"),
    ("л", "ł"),
    ("М", "M"),
    ("м", "m"),
    ("Н", "N"),
    ("н", "n"),
    ("О", "O"),
    ("о", "o"),
    ("П", "P"),
    ("п", "p"),
    ("Р", "R"),
    ("р", "r"),
    ("С", "S"),
    ("с", "s"),
    ("Т", "T"),
    ("т", "t"),
    ("У", "U"),
    ("у", "u"),
    ("Ф", "F"),
    ("ф", "f"),
    ("Х", "Ch"),
    ("х", "ch"),
    ("Ц", "C"),
    ("ц", "c"),
    ("Ч", "Cz"),
    ("ч", "cz"),
    ("Ш", "Sz"),
    ("ш", "sz"),
    ("Щ", "Szcz"),
    ("щ", "szcz"),
    ("Ю", "Ju"),
    ("ю", "ju"),
    ("Я", "Ja"),
    ("я", "ja"),
    ("Ь", "’"),
    ("ь", "’"),
];

/// Transliterate Ukrainian Cyrillic text into the Lozynsky Latin alphabet.
/// Characters without a known mapping are passed through unchanged.
///
/// # Examples
/// ```rust
/// use ukraine::latin::transliterate_lozynsky;
/// # fn main() {
/// let original = "Слава Україні. Героям слава!";
/// let transliterated = transliterate_lozynsky(original);
/// assert_eq!(transliterated, "Sława Ukrajini. Herojam sława!");
/// }
/// ```
pub fn transliterate_lozynsky(text: &str) -> String {
    let mut output = String::with_capacity(text.len());
    let mut index = 0;

    while index < text.len() {
        let mut matched = false;

        for (cyrillic, latin) in LOZYNSKY_RULES {
            if text[index..].starts_with(cyrillic) {
                output.push_str(latin);
                index += cyrillic.len();
                matched = true;
                break;
            }
        }

        if !matched {
            if let Some(ch) = text[index..].chars().next() {
                output.push(ch);
                index += ch.len_utf8();
            } else {
                break;
            }
        }
    }

    output
}