import type {
	ReadOnlyIterable,
	ReadOnlyIterableIterator,
} from "@lou.codes/types";
/**
 * Flattens one level of the given iterable.
 *
 * @category Generators
 * @example
 * ```typescript
 * flat([1, 2, [3, 4]]); // [1, 2, 3, 4]
 * ```
 * @param iterable Iterable to flatten.
 * @returns Iterable with flatten items.
 */
export declare const flat: <Iterable extends ReadOnlyIterable>(
	iterable: Iterable,
) => Iterable extends ReadOnlyIterable<infer Item> ?
	Item extends ReadOnlyIterable<infer SubItem> ?
		ReadOnlyIterableIterator<SubItem>
	:	ReadOnlyIterableIterator<Item>
:	never;