import type { AnyIterable, Store } from './index.js';
interface Comparer<T> {
    (x: T, y: T): number;
}
export declare const compareOn: <T>(key: (arg: T) => unknown) => Comparer<T>;
export declare function chunkBySize<T>(maxSize: number | undefined, iterable: AnyIterable<T>): AsyncGenerator<Array<T>>;
export declare function merge<T>(iterables: Array<AnyIterable<T>>, comparer: Comparer<T>): AsyncGenerator<any, void, unknown>;
export declare const defaultStore: <T>() => {
    write: (chunk: AnyIterable<T>) => Promise<AnyIterable<T>>;
    dispose: () => Promise<void>;
};
interface Options<T = unknown> {
    maxSize: number;
    maxFiles?: number;
    comparer: Comparer<T>;
    store: Store<T>;
}
export declare const defaultOptions: <T>() => {
    maxSize: number;
    comparer: Comparer<unknown>;
    store: {
        write: (chunk: AnyIterable<T>) => Promise<AnyIterable<T>>;
        dispose: () => Promise<void>;
    };
    maxFiles: undefined;
};
export declare function sort<T>(iterable: Iterable<T>, options?: Options<T>): AsyncGenerator<any, void, undefined>;
export {};