runewords

func Word ¶

func Word(r rune) (string, bool)

Word returns the distinctive lowercase word(s) for rune r.

e.g. 'α' -> "alpha", '😀' -> "grinning face", and whether r is covered.

Covered runes exclude everything the mangler already handles (ASCII, Latin+diacritics, digits) or elides (combining marks, controls, separators, CJK, Hangul).

Callers re-segment the result (following case breaks).

The covered set is interval-encoded (maximal ranges of consecutive codepoints): a single binary search over runStart locates the range, then the global rune index is pure arithmetic — no linear scan.

Offsets into wordBlob are 18-bit (uint16 low + 2-bit high sidecar).