OwnedCompose.selected_fields: def of bendvy-ecs-core@0.1.0.4
Import: import bendvy-ecs-core@0.1.0.4/owned_compose.bend as OwnedCompose
Lines 81-85 of bendvy-ecs-core@0.1.0.4/owned_compose.bend: https://jend.leeeet.dev/read.txt?path=bendvy-ecs-core@0.1.0.4/owned_compose.bend&start_line=81&end_line=85

import Base
import world.bend as W
import transaction.bend as T
import compose.bend as Q
import capabilities.bend as Cap

# Separate closed template fields avoid constructing runtime Plan for projections.
def selected_fields(~S: Data,~Store: Type,~R: Type,~E: Data,~Ops: Type -> Type,~H: Type,~A: Data,~U: Data,~Out: Data,~caps:Ops(H),~select:Q.Frame<S,Store,R,E> -> Q.Frame<S,Store,R,E> & Bool,~enter:Q.Frame<S,Store,R,E> -> H,~leave:H -> Q.Frame<S,Store,R,E>,~body: @-H: Type -> @-caps: Ops(H) -> A -> H -> H & (T.Outcome<U> & Out),args: A,next: T.Tx<W.World<S,Store,R,E>,E> -> T.Tx<W.World<S,Store,R,E>,E> & (T.Outcome<Q.Error<U>> & List<&2,Out>),observed: Q.Frame<S,Store,R,E> & Bool) -> T.Tx<W.World<S,Store,R,E>,E> & (T.Outcome<Q.Error<U>> & List<&2,Out>):
  match observed:
    case (Q.Frame{tx,_,_,_},False{}): next(tx)
    case (frame,True{}): body_returned(~S,~Store,~R,~E,~U,~Out,next,left(~S,~Store,~R,~E,~H,~U,~Out,~leave,Cap.invoke(~Ops,~A,~(T.Outcome<U> & Out),~body,~H,~caps,args,enter(frame))))

Uses (12):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  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/capabilities.bend&name=invoke
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/compose.bend&name=Error
  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/owned_compose.bend&name=body_returned
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/owned_compose.bend&name=left
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/transaction.bend&name=Outcome
  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=World