EntityAllocator.visible_join: def of bendvy-ecs-core@0.1.0.3
Import: import bendvy-ecs-core@0.1.0.3/entity_allocator.bend as EntityAllocator
Lines 100-102 of bendvy-ecs-core@0.1.0.3/entity_allocator.bend: https://jend.leeeet.dev/read.txt?path=bendvy-ecs-core@0.1.0.3/entity_allocator.bend&start_line=100&end_line=102

import Base
import entity_key.bend as K

def visible_join(+key:K.Key,next:Allocator -> List<&2,K.Key> -> Allocator & List<&2,K.Key>,reversed:List<&2,K.Key>,observed:Allocator & Bool) -> Allocator & List<&2,K.Key>:
  match observed:
    case (allocator,present):next(allocator,keep(Bool.not(present),key,reversed))

Uses (8):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.not
  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@0.1.0.3/entity_allocator.bend&name=Allocator
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.3/entity_allocator.bend&name=keep
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.3/entity_key.bend&name=Key