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feat(types): tagged-union enums — variant payloads + binding match + exhaustiveness (#56) 
Extend `enum` from named int constants to a tagged union: a variant may
carry a payload (`enum Tile { Empty, Wall, Door(int), Portal(int, int) }`).
Such enums box to a heap record (an i32 tag at offset 0, then one 8-byte
slot per payload position); an all-bare enum keeps its zero-cost compile-
time-ordinal representation, byte-for-byte unchanged (every golden render
and the bootstrap fixpoint still hold).

- Parser: variant payload declarations, stored as N_PARAM kids on the
  variant node.
- Construction: by name — `Door(3)`, `Portal(x, y)`, bare `Empty` — resolved
  ahead of the function-call fallback and boxed with the payloads coerced to
  their declared types.
- match: destructures a tagged scrutinee, switching on the tag and binding
  each arm's payload names in a scoped local frame.
- Checking pass: a tagged `match` must be exhaustive (cover every variant or
  end in `_`), and constructor/pattern arities and binding forms are checked
  — all reported where the scrutinee's type is known.

Adds selfhost/tests/enums.ludic to the regression suite and documents the
feature in LANGUAGE.md and the enum/match pages.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-09-01 03:07:46 +03:00
..
angle feat(types): Huge + Angle + Percent polish numeric types (#55) 2026-08-31 19:04:37 +03:00
anim feat(anim): animation ergonomics — named clips, Anim.play/Motion.to, frame events, fluent Tween handles (#48) 2026-08-31 16:53:16 +03:00
annotations refactor(lang): rename the ptr/ptrs types to pointer/pointers 2026-08-30 01:58:54 +03:00
audio feat(audio): Audio.* standard library over a native AVAudioPlayer backend (#22) 2026-08-31 17:52:31 +03:00
bigint feat(types): BigInt + Decimal exact economy numbers (#52) 2026-08-31 18:45:14 +03:00
builtins feat(types): option (some/none) safety type (#53) 2026-08-31 19:11:27 +03:00
camera feat(rendering): add Screen.camera/clip/blend_mode/oval + Camera.* + Screen.pixel (#23) 2026-08-31 13:43:01 +03:00
clock feat(stdlib): DateTime format/parse + simulated Clock — completes #9 2026-08-30 03:51:48 +03:00
collision refactor(stdlib): de-abbreviate namespaces (Mem/Sys/Net/Collide) 2026-08-30 01:30:47 +03:00
color feat(stdlib): namespaced standard library (issue #2) 2026-08-30 00:26:19 +03:00
colors docs: add Networking section + process/OS builtins (net_send, owner, is_server, serialize/apply, arg, exit, run, getenv, read_char, file_*) 2026-08-29 16:39:29 +03:00
control feat(types): tagged-union enums — variant payloads + binding match + exhaustiveness (#56) 2026-09-01 03:07:46 +03:00
crypto feat(stdlib): finish Crypto (CSPRNG + base64) and add Uuid.* library (#19 #16) 2026-08-30 21:40:51 +03:00
date feat(stdlib): Time/Date/Duration calendar-clock core (issue #9) 2026-08-30 03:37:38 +03:00
datetime feat(stdlib): DateTime format/parse + simulated Clock — completes #9 2026-08-30 03:51:48 +03:00
decimal feat(types): BigInt + Decimal exact economy numbers (#52) 2026-08-31 18:45:14 +03:00
dict feat(types): Dict + Set string-keyed containers (#54) 2026-08-31 18:51:42 +03:00
duration feat(stdlib): Time/Date/Duration calendar-clock core (issue #9) 2026-08-30 03:37:38 +03:00
ease feat(stdlib): Math.exp/log/pow + Ease.elastic transcendentals (issue #25) 2026-08-30 01:19:44 +03:00
ecs refactor(lang): rename the str type (and stringify builtin) to string 2026-08-30 01:51:11 +03:00
events docs(api): per-symbol pages, fuzzy search, deep token linking, hover cards 2026-08-29 17:53:22 +03:00
fs feat(stdlib): add Fs.* / Path.* / Mime.* — filesystem, paths, content types (#10) 2026-08-30 22:43:50 +03:00
grid feat(stdlib): add Grid.* — tile geometry + A* pathfinding over the tilemap (#24) 2026-08-31 12:36:12 +03:00
hash feat(lang,stdlib): 64-bit long type + 64-bit Hash variants (issue #17) 2026-08-30 01:01:06 +03:00
http feat(http): Http.* poll-based HTTP/HTTPS client over a native NSURLConnection backend (#6) 2026-08-31 18:10:53 +03:00
huge feat(types): Huge + Angle + Percent polish numeric types (#55) 2026-08-31 19:04:37 +03:00
input feat(input): raw device layer — multi-key held state, analog, mouse, gamepad, touch, full-state replay (#50) 2026-08-31 17:14:24 +03:00
ivec2 feat(types): IVec2 + Rect 2D value types (#1) 2026-08-31 18:29:41 +03:00
json feat(reflect): generic value tree + Reflect.serialize/apply + JSON bridge (#44) 2026-08-31 15:19:21 +03:00
light feat(light): render-quality tiers 3-4 — cones, falloff, soft shadows, gels, normals, day/night (#49) 2026-08-31 16:35:41 +03:00
list feat(stdlib): sorting toolkit — sort_by/sort_desc_by/sort_with + stable merge sort (#11) 2026-08-30 11:39:26 +03:00
log feat(stdlib): add Log.* — levelled, structured logging (#15) 2026-08-30 21:57:22 +03:00
map docs(api): per-symbol pages, fuzzy search, deep token linking, hover cards 2026-08-29 17:53:22 +03:00
math refactor(lang): rename builtins flr->floor and fx->fixed 2026-08-30 02:01:56 +03:00
memory refactor(lang): rename the ptr/ptrs types to pointer/pointers 2026-08-30 01:58:54 +03:00
mime feat(stdlib): add Fs.* / Path.* / Mime.* — filesystem, paths, content types (#10) 2026-08-30 22:43:50 +03:00
motion feat(anim): animation ergonomics — named clips, Anim.play/Motion.to, frame events, fluent Tween handles (#48) 2026-08-31 16:53:16 +03:00
network docs: merge duplicate networking namespace dirs; guard against recurrence 2026-08-30 16:46:21 +03:00
noise feat(stdlib): add Noise.* — deterministic fixed-point procedural noise (#3) 2026-08-30 21:50:50 +03:00
operators refactor(lang): rename the ptr/ptrs types to pointer/pointers 2026-08-30 01:58:54 +03:00
os feat(stdlib): add Os.* — the OS/environment interface (#21) 2026-08-30 22:19:11 +03:00
path feat(stdlib): add Fs.* / Path.* / Mime.* — filesystem, paths, content types (#10) 2026-08-30 22:43:50 +03:00
percent feat(types): Huge + Angle + Percent polish numeric types (#55) 2026-08-31 19:04:37 +03:00
phases docs(api): per-symbol pages, fuzzy search, deep token linking, hover cards 2026-08-29 17:53:22 +03:00
query feat(stdlib): add Query.* — ECS spatial queries over the reflection ABI (#42) 2026-08-31 13:19:25 +03:00
random feat(stdlib): namespaced standard library (issue #2) 2026-08-30 00:26:19 +03:00
rect feat(types): IVec2 + Rect 2D value types (#1) 2026-08-31 18:29:41 +03:00
reflect feat(reflect): generic value tree + Reflect.serialize/apply + JSON bridge (#44) 2026-08-31 15:19:21 +03:00
regex feat(stdlib): add Regex.* — a linear-time regular-expression engine (#18) 2026-08-31 12:23:19 +03:00
save feat(stdlib): namespaced standard library (issue #2) 2026-08-30 00:26:19 +03:00
scenes docs(api): per-symbol pages, fuzzy search, deep token linking, hover cards 2026-08-29 17:53:22 +03:00
screen feat(rendering): add Screen.camera/clip/blend_mode/oval + Camera.* + Screen.pixel (#23) 2026-08-31 13:43:01 +03:00
set feat(types): Dict + Set string-keyed containers (#54) 2026-08-31 18:51:42 +03:00
structure feat(types): tagged-union enums — variant payloads + binding match + exhaustiveness (#56) 2026-09-01 03:07:46 +03:00
system refactor(stdlib): consolidate System.* onto Os.*, retire duplicated members 2026-08-30 22:54:28 +03:00
testing feat(testing): line coverage via --coverage + bin/x test --coverage (#45) 2026-08-31 14:51:14 +03:00
text refactor(stdlib): consolidate System.* onto Os.*, retire duplicated members 2026-08-30 22:54:28 +03:00
time feat(stdlib): Time/Date/Duration calendar-clock core (issue #9) 2026-08-30 03:37:38 +03:00
tween feat(anim): animation ergonomics — named clips, Anim.play/Motion.to, frame events, fluent Tween handles (#48) 2026-08-31 16:53:16 +03:00
types feat(types): IVec2 + Rect 2D value types (#1) 2026-08-31 18:29:41 +03:00
unicode feat(stdlib): add Unicode.* — UTF-8 code points, graphemes, case mapping (#13) 2026-08-30 22:29:00 +03:00
uuid feat(stdlib): finish Crypto (CSPRNG + base64) and add Uuid.* library (#19 #16) 2026-08-30 21:40:51 +03:00
value feat(reflect): generic value tree + Reflect.serialize/apply + JSON bridge (#44) 2026-08-31 15:19:21 +03:00
vector feat(stdlib): 2D Vector type + Vector.* namespace (issue #25) 2026-08-30 02:09:38 +03:00
world feat(stdlib): namespaced standard library (issue #2) 2026-08-30 00:26:19 +03:00