import { IterItem } from "./iter-item";
/**
 * Internal resursive iteration utility.
 *
 * @remarks
 * This function is ultimately responsible for all iteration operations in
 * external functions. It will generate objects for each item in an error
 * structure, including each item, its parent, and whether or not the item was
 * in an array on the parent. It will also detect any circular references and
 * terminate them, preventing infinite loops.
 *
 * @param err - Error instance to iterate.
 * @param parent - Parent of `err`, if any.
 * @param inArray - Set to true if `err` is in an `errors` array on `parent`.
 * @param seen - Set of Errors that have already been encountered along the
 *   current chain. Used to check for circular references.
 */
export declare function iterateInternal(err: Error, parent?: Error | null, inArray?: boolean, seen?: Set<Error>): IterableIterator<IterItem>;