HierarchyTraversalProvider.checked_root: def of bendvy-ecs-core@0.1.0.4
Import: import bendvy-ecs-core@0.1.0.4/hierarchy_traversal_provider.bend as HierarchyTraversalProvider
Lines 45-48 of bendvy-ecs-core@0.1.0.4/hierarchy_traversal_provider.bend: https://jend.leeeet.dev/read.txt?path=bendvy-ecs-core@0.1.0.4/hierarchy_traversal_provider.bend&start_line=45&end_line=48

import Base
import bendvy-ecs-core@0.1.0.4/relation_types.bend as G
import bendvy-ecs-core@0.1.0.4/relation_commands.bend as A
import bendvy-ecs-core@0.1.0.4/relation_reorder.bend as Reorder
import bendvy-ecs-core@0.1.0.4/world.bend as W

def checked_root(~S:Data,~C:Type,~R:Type,~E:Data,~descriptor:G.HierarchyDescriptor<S>,observed:W.World<S,A.Store<S,C>,R,A.Notice<S,E>> & Bool,target:W.Handle<S>) -> W.World<S,A.Store<S,C>,R,A.Notice<S,E>> & Maybe<&2,W.Handle<S>>:
  match observed:
    case (world,False{}): (world,None{})
    case (world,True{}): W.with_store(~S,~A.Store<S,C>,~R,~A.Notice<S,E>,~Maybe<&2,W.Handle<S>>,store => store_root(~S,~C,store,Reorder.descriptor(~S,descriptor),target),world)

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=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/hierarchy_traversal_provider.bend&name=store_root
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/relation_commands.bend&name=Notice
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/relation_commands.bend&name=Store
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/relation_reorder.bend&name=descriptor
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/relation_types.bend&name=HierarchyDescriptor
  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=World
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/world.bend&name=with_store