import type { InitializedToInitializedOperator, ToBaseOperator } from '../types';
export declare const withIndex: <A>() => ToBaseOperator<A, readonly [number, A]>;
export declare const withIndexI: <A>() => InitializedToInitializedOperator<A, readonly [number, A]>;
export declare const attachIndex: <A>() => ToBaseOperator<A, readonly [number, A]>;
export declare const attachIndexI: <A>() => InitializedToInitializedOperator<A, readonly [number, A]>;