ludic/examples/events.ludic
Orkuncakilkaya bca8f126fc Networking N2–N6, and a fully C-free toolchain
Implement the rest of NETWORKING-DESIGN.md (N2–N6) and eliminate every
`.c` file from the repo. clang remains only the LLVM-IR assembler; no C
is compiled anywhere.

Networking (selfhost/emit_net.ludic + parser/emit changes):
- N2 @Sync: per-model serialize/apply + by-kind dispatchers; POD-scalar
  compile error and empty-participation warning; selective replication.
- N3 @Owned: @L_owner array + owner/set_owner/is_owner; owners snapshot.
- N4 @ToServer/@ToClients remote events: framed net_send + net_pump re-emit.
- N5 @Server/@Predicted role guards + drivable sim (tick_fixed/tick_render,
  entry-owns-the-loop).
- Built-in loopback transport so multiplayer runs with zero foreign code;
  extern fn net_send/net_poll still overrides it for a real socket.
- N6 blessed runtime (examples/net_rt.ludic) + end-to-end demo (net_demo).
- Fix: llty("entity") is now i32 (entities are i32 handles), so let e = self().

C elimination:
- Networking + foreign-mod-ABI tests rewritten as self-contained pure-Ludic
  programs (examples/net_*, world_*, mod_events, scoped); tests/ removed.
- Reflection ABI exposed to Ludic as world_* builtins (Ludic-to-Ludic modding).
- Formatter rewritten C→Ludic: tools/ludic-tools/fmt.ludic.
- Language server rewritten C→Ludic: tools/ludic-tools/lsp.ludic (lexer, index
  parser, cross-file workspace resolver, JSON, all LSP handlers).
- Obsolete migrate_*.c codemods deleted; ludic_syntax.h kept as vocabulary data.

Suites: ./test.sh 44/44, ./tools/test-tools.sh 28/28 (LSP 42/42), fixpoint holds.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-08-29 15:08:23 +03:00

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# events.ludic — EV0: the event bus core.
#
# `event E { fields }` declares a public event carrying a POD payload. `@On(E)
# handler …` registers a listener whose body reads the payload fields by name.
# `emit E(field: v, …)` fires the event: it calls every @On(E) listener, in
# declaration order, as a direct call — the whole thing desugars to code, with no
# runtime and no dispatch table. A program that declares no `event` is compiled
# byte-for-byte as before (the subsystem is gated on `g_events`).
#
# Running it prints: 5 8 20 30 999 42 42
program Events {
event Hurt { entity: int = 0, amount: int = 0 } # a payload with fields + defaults
event Cleared { } # an empty payload is allowed
@On(Hurt) handler Flash { print(amount) } # listeners bind payload fields by name
@On(Hurt) handler Guard { print(entity + amount) } # a second listener, run after the first
@On(Cleared) handler Cheer { print(999) }
entry {
emit Hurt(entity: 3, amount: 5) # -> Flash 5, Guard 3+5=8
emit Hurt(entity: 10, amount: 20) # -> Flash 20, Guard 10+20=30
emit Cleared() # -> Cheer 999
emit Hurt(amount: 42) # entity defaults to 0 -> Flash 42, Guard 0+42=42
}
}