declare abstract class TransformIterable<T, R> {
    protected iterable: Iterable<T>;
    protected transformers: ((value: T, previous: T | undefined) => R)[];
    constructor(iterable: Iterable<T>);
    abstract pipe<P>(transformer: (value: Exclude<T, undefined>, previous: T | undefined) => P): any;
    [Symbol.iterator](): Iterator<Exclude<R, undefined>>;
}
export declare class IterableTransformer<T, R> extends TransformIterable<T, R> {
    constructor(iterable: Iterable<T>, transformers: ((value: T) => R)[]);
    pipe<P>(transformer: (value: Exclude<T, undefined>, previous: T | undefined) => P): IterableTransformer<P, P>;
    toArray(): Exclude<R, undefined>[];
}
export declare class IterablePipeline<T, R, O = T> extends TransformIterable<T, R> {
    constructor(iterable: Iterable<T>, transformers: ((value: T) => R)[]);
    pipe<P>(transformer: (value: Exclude<T, undefined>, previous: T | undefined) => P): IterablePipeline<P, P, O>;
    toPipeline(): (iterable: Iterable<O>) => Exclude<R, undefined>[];
}
type Unwrap<T extends Iterable<any>> = T extends Iterable<infer U> ? U : never;
export declare function iterate<T extends Iterable<any>>(): IterablePipeline<Unwrap<T>, unknown>;
export declare function iterate<T extends Iterable<any>>(iterable: T): IterableTransformer<Unwrap<T>, unknown>;
export {};
//# sourceMappingURL=iterator-pipeline.d.ts.map