Column.evacuate_phase: def of bendvy-ecs-core@0.1.0.3
Import: import bendvy-ecs-core@0.1.0.3/column.bend as Column
Lines 205-213 of bendvy-ecs-core@0.1.0.3/column.bend: https://jend.leeeet.dev/read.txt?path=bendvy-ecs-core@0.1.0.3/column.bend&start_line=205&end_line=213

import Base
import owner_handoff.bend as H

def evacuate_phase(~S:Data,~C:Type,gas:Nat,phase:EvacuationPhase<S,C>) -> Array<Maybe<&1,C>> & H.PrototypeHandoffRows<S,C>:
  match gas phase:
    case _ Fetch{0n,_,values,rows}: (values,rows)
    case 0n Fetch{_,_,values,rows}: (values,rows)
    case 0n Taken{_,_,rows,(values,None{})}: (values,rows)
    case 0n Taken{_,id,rows,(values,Some{owner})}: (values,H.HandoffCon{id,owner,rows})
    case 1n+more Fetch{1n+rest,+id,values,rows}: evacuate_phase(~S,~C,more,Taken{rest,id,rows,Array.swap(Maybe<&1,C>,values,U32.sub(id,1),None{})})
    case 1n+more Taken{fuel,+id,rows,(values,None{})}: evacuate_phase(~S,~C,more,Fetch{fuel,U32.sub(id,1),values,rows})
    case 1n+more Taken{fuel,+id,rows,(values,Some{owner})}: evacuate_phase(~S,~C,more,Fetch{fuel,U32.sub(id,1),values,H.HandoffCon{id,owner,rows}})

Uses (9):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Array
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Array.swap
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  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=Base/base.bend&name=U32.sub
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.3/column.bend&name=EvacuationPhase
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.3/owner_handoff.bend&name=PrototypeHandoffRows