OxL Reference
EnglishРусский

kw after

Contextual keyword — select branches (§8.7)

The list of words: §1.4

Syntax

ebnf
SelArm      = ( "recv" Pattern "from" Expr | "send" Expr "to" Expr | "after" Expr | "else" ) "=>" Expr ;

Grammar: App. A

Defined in

  • 17.4 Timers and schedules — after, every, at are std.time functions with a closure as the last argument; they run in the current task until it is cancelled (for the bac
  • 1.4 Keywords — Reserved (cannot be used as names)
  • 8.7 Channels and select — tx.send(x) suspends when the buffer is full; cap
  • 10.2 rpc attributes — Defaults for all rpcs are set in cluster { defaults { …
  • 18.4 Simulation — In sim the scheduler, network, clocks, randomness and disk failures are deterministic; the result depends only on the seed.

Examples

oxl
sleep(BACKOFF)
after(RETRY_DELAY) { retry() }
every(SYNC_PERIOD) { sync() }
at(cron"0 9 * * MON-FRI".in(tz"Europe/Moscow")) { report() }

— 17.4 Timers and schedules

oxl
let (tx, rx) = chan<Job>(cap: JOB_QUEUE)

select {
  recv job from rx  => process(job)
  send r to results => sent += 1
  after IDLE_TIMEOUT => log.info("idle")
  else              => tick()          // non-blocking variant
}

— 8.7 Channels and select

Related diagnostics

attribute-not-applicable, cache-not-readonly, invalid-window, retry-not-idempotent, rpc-attr

See also