def observed

bendvy-ecs-core@0.1.0.3 · execution_recoverable_component.bend:32

import Base
import bendvy-ecs-core@0.1.0.3/chunk_column.bend as Column
import bendvy-ecs-core@0.1.0.3/execution_composer_layout.bend as Layout
import bendvy-ecs-core@0.1.0.3/lifecycle.bend as Life
import bendvy-ecs-core@0.1.0.3/change_tick.bend as Tick

32def observed(~S:Data,~layout:Layout.Layout,~route:Layout.Route,+index:U32,incoming:Maybe<Layout.payload(layout,route)>,tick:Tick.Tick,saved:Maybe<&2,Life.Stamp>,result:Column.Column<S,Layout.stored(layout,route)> & Maybe<&2,Life.Stamp>) -> Column.Column<S,Layout.stored(layout,route)> & Exchange<Layout.payload(layout,route)>:
33  match result:
34    case (column,None{}):(column,ExchangeRefused{incoming})
35    case (column,Some{prior}):swapped(~S,~layout,~route,index,prior,saved,Column.swap_at(~S,~Layout.stored(layout,route),column,index,packed(~layout,~route,incoming),tick))