def selected_row

bendvy-ecs-core@0.1.0.4 · relation_query.bend:102

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

102def 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>:
103  match observed:
104    case (tx,(False{},_)): next(tx)
105    case (tx,(True{},row)): output_join(~S,~V,~C,~R,~E,~Out,invoke(~S,~V,~C,~R,~E,~Out,~body,row,tx),next)