RelationQuery.selected_row: def of bendvy-ecs-core@0.1.0.4
Import: import bendvy-ecs-core@0.1.0.4/relation_query.bend as RelationQuery
Lines 102-105 of bendvy-ecs-core@0.1.0.4/relation_query.bend: https://jend.leeeet.dev/read.txt?path=bendvy-ecs-core@0.1.0.4/relation_query.bend&start_line=102&end_line=105

import Base
import relation_commands.bend as A
import world.bend as W
import transaction.bend as X
import capabilities.bend as Cap

def selected_row(~S:Data,~V:Data,~C:Type,~R:Type,~E:Data,~Out:Data,~body:@-H:Type -> Cap.ValueRead<H,Row<S,V>> -> H -> H & Out,observed:X.Tx<W.World<S,A.Store<S,C>,R,A.Notice<S,E>>,A.Notice<S,E>> & (Bool & Row<S,V>),next:X.Tx<W.World<S,A.Store<S,C>,R,A.Notice<S,E>>,A.Notice<S,E>> -> X.Tx<W.World<S,A.Store<S,C>,R,A.Notice<S,E>>,A.Notice<S,E>> & List<&2,Out>) -> X.Tx<W.World<S,A.Store<S,C>,R,A.Notice<S,E>>,A.Notice<S,E>> & List<&2,Out>:
  match observed:
    case (tx,(False{},_)): next(tx)
    case (tx,(True{},row)): output_join(~S,~V,~C,~R,~E,~Out,invoke(~S,~V,~C,~R,~E,~Out,~body,row,tx),next)

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=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@0.1.0.4/capabilities.bend&name=ValueRead
  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_query.bend&name=Row
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/relation_query.bend&name=invoke
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/relation_query.bend&name=output_join
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/transaction.bend&name=Tx
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.4/world.bend&name=World