import { Reducer } from "../collections";
import { Transducer } from "./transducer";
export declare class ScanTransducer<A, B> implements Transducer<A, B> {
    reducer: Reducer<A, B>;
    seed: B;
    constructor(reducer: Reducer<A, B>, seed: B);
    async_(iterable: AsyncIterable<A>): AsyncIterable<B>;
    sync(iterable: Iterable<A>): Iterable<B>;
}
export declare function scan<A, B>(reducer: Reducer<A, B>, seed: B): ScanTransducer<A, B>;