Compose.spawn_join: def of bendvy-ecs-core@0.1.0.4
Import: import bendvy-ecs-core@0.1.0.4/compose.bend as Compose
Lines 128-131 of bendvy-ecs-core@0.1.0.4/compose.bend: https://jend.leeeet.dev/read.txt?path=bendvy-ecs-core@0.1.0.4/compose.bend&start_line=128&end_line=131

import Base
import bendvy-ecs-core@0.1.0.4/change_tick.bend as Tick
import world.bend as W
import transaction.bend as T

def spawn_join(~S: Data,~Store: Type,~R: Type,~E: Data,handle: W.Handle<S>,error: Maybe<&2,W.WorldError>,cursor: Maybe<&2,Tick.Tick>,observed: T.Tx<W.World<S,Store,R,E>,E> & W.Reservation<S>) -> Frame<S,Store,R,E> & W.Reservation<S>:
  match observed:
    case (tx,W.Reserved{+reserved}): (Frame{tx,handle,error,cursor},W.Reserved{reserved})
    case (tx,W.ReservationRejected{+reason}): (Frame{tx,handle,first_error(error,reason),cursor},W.ReservationRejected{reason})

Uses (11):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Sigma
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/change_tick.bend&name=Tick
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/compose.bend&name=Frame
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/compose.bend&name=first_error
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/transaction.bend&name=Tx
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/world.bend&name=Handle
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/world.bend&name=Reservation
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/world.bend&name=World
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/world.bend&name=WorldError