import { EventStream } from "../EventStream";
import { Observable } from "../Observable";
/**
 * Generator type for `F.repeat`
 * @see repeat
 *
 * @public
 */
export declare type Generator<ValueType> = (i: number) => Observable<ValueType> | "" | false | null | undefined | 0;
/**
 * Calls generator function which is expected to return an observable. When the spawned
 * observable ends, the generator is called again to spawn a new observable. If generator
 * returns a falsy value, the stream ends.
 *
 * @param generator - Generator function that's supposed to return an observable or `null` to end the stream
 * @returns An EventStream containing values and errors from the spawned observable.
 * @see Generator
 *
 * @example
 *
 * const events = F.repeat(i => i < 10 && F.fromArray([...Array(i).keys()].map(_ => i)))
 *
 * @public
 */
export declare function repeat<ValueType>(generator: Generator<ValueType>): EventStream<ValueType>;