def visible_join

bendvy-ecs-core@0.1.0.3 · entity_allocator.bend:100

import Base
import entity_key.bend as K

100def 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>:
101  match observed:
102    case (allocator,present):next(allocator,keep(Bool.not(present),key,reversed))