name : NotificationFactories.ts import { CompleteNotification, NextNotification, ErrorNotification } from './types'; /** * A completion object optimized for memory use and created to be the * same "shape" as other notifications in v8. * @internal */ export const COMPLETE_NOTIFICATION = (() => createNotification('C', undefined, undefined) as CompleteNotification)(); /** * Internal use only. Creates an optimized error notification that is the same "shape" * as other notifications. * @internal */ export function errorNotification(error: any): ErrorNotification { return createNotification('E', undefined, error) as any; } /** * Internal use only. Creates an optimized next notification that is the same "shape" * as other notifications. * @internal */ export function nextNotification<T>(value: T) { return createNotification('N', value, undefined) as NextNotification<T>; } /** * Ensures that all notifications created internally have the same "shape" in v8. * * TODO: This is only exported to support a crazy legacy test in `groupBy`. * @internal */ export function createNotification(kind: 'N' | 'E' | 'C', value: any, error: any) { return { kind, value, error, }; }