ludic/docs/language/networking/fn-local_id.md
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Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-08-29 17:53:22 +03:00

1.1 KiB

id name category kind tokens sig tip order
fn-local_id local_id networking builtin local_id local_id() -> int This peer's own network id. 50

local_id returns the network id assigned to the local peer by the runtime. It is the value is_owner compares an instance's owner against, so it answers "which of these owned instances are mine?" when you drive ownership logic by hand. Offline, with no networking runtime spliced in, it defaults to 0. You rarely need it directly — is_owner already folds the comparison — but it is useful when tagging spawned instances or addressing a specific peer.

program IdentifyPeer {
  @Sync property Position { column: int = 0, row: int = 0 }
  @Owned model Player { @Sync Position }

  entry {
    spawn Player { Position { column: 0, row: 0 } }
    for (Position) in query [Position, {Player}] {
      let player_id = self()
      set_owner(player_id, local_id())   # claim this instance for the local peer
      print(is_owner(player_id))         # 1 — owner now equals local_id()
    }
  }
}