ludic/examples/library
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feat(stdlib): add Unicode.* — UTF-8 code points, graphemes, case mapping (#13)
Make Ludic text correct-by-default over UTF-8, so player names, translated UI,
and chat behave for every language instead of counting bytes and splitting
characters in half. The byte-oriented Text.* stays for speed; Unicode.* is the
layer that understands code points and (approximately) grapheme clusters.

  - len / byte_len          code points vs bytes — the two lengths, kept distinct
  - is_valid_utf8           strict validation of untrusted input
  - char_at / chars         code-point access by index; chars() -> []int
  - upper / lower           case mapping (ASCII + Latin-1)
  - truncate                first n code points, never a half-character
  - grapheme_len            user-perceived characters (approx UAX#29)

Pure integer/byte IR over NUL-terminated buffers; C-free, no data-table blob.
Decoding and validation cover the full UTF-8 range (overlong/surrogate/>10FFFF
rejected). grapheme_len collapses combining marks, variation selectors, ZWJ
sequences (family emoji), and regional-indicator flag pairs. Documented v1
scope: wider-script/locale case rules (Latin-Extended, Greek, Cyrillic, Turkish
i, German ß) and NFC normalization are follow-ups.

- examples/library/unicode.ludic: asserts the invariants across ASCII, Latin-1
  (é round-trips through upper/lower), a decomposed "café" (5 code points, 4
  graphemes), a ZWJ family emoji (5 code points, 1 grapheme), and a flag (2
  regional indicators, 1 grapheme). Wired into `x test` (now 55 passed).
- docs: a new Unicode section + 9 per-symbol pages clarifying byte vs code point
  vs grapheme; inventory updated; every fence passes check-docs; site builds.
- seed regenerated; `x bootstrap-cfree` fixpoint holds.

Closes #13

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-08-30 22:29:00 +03:00
..
arena.ludic chore(repo): DX cleanup — categorise examples, text-diffable golden, build/ output (#27 #28 #30) 2026-08-30 18:54:21 +03:00
combat.ludic chore(repo): DX cleanup — categorise examples, text-diffable golden, build/ output (#27 #28 #30) 2026-08-30 18:54:21 +03:00
crypto.ludic feat(stdlib): finish Crypto (CSPRNG + base64) and add Uuid.* library (#19 #16) 2026-08-30 21:40:51 +03:00
logging.ludic feat(stdlib): add Log.* — levelled, structured logging (#15) 2026-08-30 21:57:22 +03:00
noise.ludic feat(stdlib): add Noise.* — deterministic fixed-point procedural noise (#3) 2026-08-30 21:50:50 +03:00
os.ludic feat(stdlib): add Os.* — the OS/environment interface (#21) 2026-08-30 22:19:11 +03:00
unicode.ludic feat(stdlib): add Unicode.* — UTF-8 code points, graphemes, case mapping (#13) 2026-08-30 22:29:00 +03:00
uuid.ludic feat(stdlib): finish Crypto (CSPRNG + base64) and add Uuid.* library (#19 #16) 2026-08-30 21:40:51 +03:00