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Unicode guide/Implementations
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== Lua == Lua describes itself as 'encoding-agnostic', whatever that is. It certainly handles ASCII well. *Character type: Byte, encoding not defined * Byte strings: No * Internal encoding: None * String encoding: Undefined * Supports bytes in strings: Depends on encoding * Supports surrogates in strings: Depends on encoding * Supports invalid code points in strings: Depends on encoding * Supports normalizing strings: No * Supports querying character properties: No * Supports breaking by code point: Yes if encoded in UTF-8 * Supports breaking by extended grapheme cluster: No * Supports breaking by text boundaries: No * Supports encoding and decoding to other encodings: No * Supports Unicode regex extensions: Not applicable, no regex at all * Classifies by: C APIs, maybe by locale, only supports 8-bit characters * Collates by: Doesn't provide an API for this * Converts case by: C APIs, maybe by locale, only supports 8-bit characters * Locale tailoring is done by: Per-process C locale *Wraps operating system APIs with Unicode ones: No Overall there's no clear path here from reading bytes to handling Unicode. Bonus points for the string.reverse function that will break Unicode strings.
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