ludic/examples/net_rpc.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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# net_rpc.ludic — N4: remote events / RPCs (NETWORKING-DESIGN §6.4, §13 N4).
#
# An `event` marked @ToServer (client→server) or @ToClients (server→clients) is a
# directional remote event — the event bus with a direction flag, no new concept.
# At an `emit` site the POD payload is serialized as [event id][fields] and
# net_send in its direction; net_pump() drains inbound frames and re-emits each
# into the ordinary @On dispatch on the far side. So `emit Fire(...)` is a remote
# call — it does not run locally; the receiver's pump runs the handler.
#
# Here two Fire RPCs are emitted (dir 5, dir 3). Before net_pump the handler has
# not run (hits still 0); after, both are drained and re-emitted (5 + 3 = 8).
program NetRpc {
property Log { hits: int = 0 }
model Sink { Log }
@ToServer event Fire { dir: int = 0 }
@On(Fire) handler OnFire {
for (Log) in query [Log] { Log.hits = Log.hits + dir }
}
entry {
spawn Sink { Log { hits: 0 } }
emit Fire(dir: 5) # serialized onto the wire (not run locally)
emit Fire(dir: 3)
for (Log) in query [Log] { print(Log.hits) } # 0
net_pump() # drain + re-emit both RPCs
for (Log) in query [Log] { print(Log.hits) } # 8
}
}