ludic/docs/language/annotations/annot-sync.md
Orkuncakilkaya 647dfec334 feat(compiler): list literals, typed compound assignment, file:line diagnostics
- `[a, b, c]` list literals (E_LIST → emit_list); static_type learns
  slice-element, `new T`, list, string and literal kinds
- `x op= y` lowers through the same path as `x = x op y` (emit_bin_vals):
  fixed `*=`/`/=` use the Q16.16 64-bit paths, string `+=` concatenates,
  int→long widens; unary `-` keeps a fixed operand's type (arith_ty)
- one `unescape()` table for "strings", 'chars' and `interpolation`;
  `'\''`, `'\\'`, `'\"'` no longer read as 0; unterminated char literals
  and unexpected characters are errors instead of silently skipped
- every diagnostic is `file:line: error: msg` (g_parse_file / g_err_file,
  Node.file + Node.line set by node()); tok_desc() in expectation errors;
  duplicate `function` names and unknown `phase` names are reported in
  source terms (phase_id used to default unknown phases to Overlay)
- interpolation holes skip braces inside string literals
- hand-IR preludes move from the user `@fn_` prefix to `@lp_` so a user
  `is_ws` / `str_eq` / `path_join` no longer collides at link time
- `@ClearColor(expr)` accepts any constant expression; `Os.pid()` added
  (docs page + inventory); `str_starts()` in support/str
- main.ludic: `else if` flag ladder, char literals, stale script comments
- examples/lang/operators.ludic covers all of the above; os.ludic covers
  Os.pid; docs pages for Os.pid and the Overlay phase; ten changesets
- reseeded: selfhost/ludicc.seed.ll is the new compiler's own fixpoint

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
2026-09-05 01:12:16 +03:00

29 lines
1.9 KiB
Markdown

---
id: annot-sync
name: @Sync
category: annotations
kind: annotation
tokens: @Sync
sig: @Sync property … / @Owned
tip: Mark fields as replicated and models as owned so the compiler generates networking.
order: 4
---
These are the two declarative switches at the top of Ludic's networking: <code>@Sync</code> says <b>what</b> replicates and <code>@Owned</code> says <b>who</b> owns an instance. Replication is opt-in at the field level and decided per model use-site — a field crosses the wire only when it is both replicable (marked <code>@Sync</code>, either on the field or via <code>@Sync property P</code> which marks every field of <code>P</code>) <b>and</b> participating (the model marks the component <code>@Sync</code>). So the same property can replicate in one model and not another, and there is no <code>@NoSync</code> because the surface is purely additive. From these marks the compiler generates the per-model <code>serialize</code>/<code>apply</code> codecs; <code>@Sync</code> on a non-POD-scalar field (like a <code>pointer</code>) is a compile error, since a machine-local pointer cannot cross the wire. <code>@Owned</code> adds the owner slot the ownership builtins and <code>@Predicted</code> read. See the dedicated <code>@Owned</code> page for ownership details.
```ludic
program SyncedWorld {
@Sync property Position { column: int = 0, row: int = 0 } # every field replicable
property Health { @Sync current: int = 0, maximum: int = 0 } # only current replicable
@Owned model Player { @Sync Position, @Sync Health } # participates -> column,row,current
model Scenery { Position } # not @Sync here -> never replicates
entry {
spawn Player { Position { column: 3, row: 4 }, Health { current: 50, maximum: 100 } }
for (Position, Health) in query [Position, Health, {Player}] {
print(sync_size(self())) # 12 = Position(8) + Health.current(4)
}
}
}
```