aqua/aqua-src/closure.aqua

module Closure declares *

export smth

service Srv("srv"):
  noop: string -> ()
  inside: -> ()
  trial: -> ()

func smth() -> bool, string:
  variable = "const"
  co on "x":
    Srv.trial()
  closure = () -> string:
    Srv.inside()
    <- variable

  on "other":
    c <- closure()
    Srv.noop(c)
  <- true, ""