import { OpenPromise } from "./OpenPromise.js";
export declare class Stream<T> implements AsyncIterable<T> {
    pending: OpenPromise<T>;
    [Symbol.asyncIterator](): AsyncIterator<T>;
    append(value: T): void;
}
export declare class StreamIterator<T> implements AsyncIterator<T> {
    source: Stream<T>;
    constructor(source: Stream<T>);
    next(): Promise<IteratorResult<T, any>>;
}