def indexed_view_checked

bendvy-ecs-core@0.1.0.3 · column.bend:113

import Base
import indexed_lifecycle.bend as M

113def indexed_view_checked(~S:Data,~C:Type,~V:Data,~project:C -> C & V,+id:U32,values:Array<Maybe<&1,C>>,metadata:M.Metadata,valid:Bool) -> Column<S,C> & Maybe<&2,V>:
114  match valid:
115    case False{}: (indexed_wrap(~S,~C,values,metadata),None{})
116    case True{}: indexed_view_taken(~S,~C,~V,~project,id,metadata,Array.swap(Maybe<&1,C>,values,U32.sub(id,1),None{}))