import { Injector, Block } from './injector';
import { Scope, MountBlock } from './types';
import { Component } from './component';
export declare type RenderItemsGetter = (host: Component, scope: Scope) => any[];
export interface IteratorBlock extends Block {
    get: RenderItemsGetter;
    body: MountBlock;
    index: number;
    updated: number;
}
/**
 * Mounts iterator block
 * @param get A function that returns collection to iterate
 * @param body A function that renders item of iterated collection
 */
export declare function mountIterator(host: Component, injector: Injector, get: RenderItemsGetter, body: MountBlock): IteratorBlock;
/**
 * Updates iterator block defined in `ctx`
 * @returns Returns `1` if iterator was updated, `0` otherwise
 */
export declare function updateIterator(block: IteratorBlock): number;
export declare function unmountIterator(block: IteratorBlock): void;
export declare function clearIterator(block: IteratorBlock): void;
export declare function prepareScope(scope: Scope, index: number, key: unknown, value: unknown): Scope;