import type { ComponentQuery } from './query.js';
/**
 * An iterator for yielding entity ids and their associated component data
 * @category Iterators
 * @example
 * // construct an instance
 * const iterator = new ComponentIterator(new ComponentQuery(entityMap, Player, Position))
 *
 * // iterate component data that is related to the Player
 * for(const [entityId, player, position] of iterator) { }
 *
 * // you can also reset the iterator back to the start
 * // without having to create a new ComponentIterator instance
 * iterator.reset()
 * for(const [entityId, player, position] of iterator) { }
 */
export declare class ComponentIterator<TKey, TRelated extends any[]> {
    private keyMap;
    private componentMaps;
    private entries;
    /**
     * Creates a new component iterator
     * @param query - The {@link ComponentQuery} to iterate over
     */
    constructor(query: ComponentQuery<TKey, TRelated>);
    /**
     * Gets the next iterator value
     * @returns An {@link IteratorResult} containing the next [entityId, keyComponentData, ...relatedComponentData] tuple
     */
    next(): IteratorResult<[number, TKey, ...TRelated]>;
    /**
     * Resets the iterator back to the first entry
     */
    reset(): void;
    /**
     * Returns this iterator instance
     */
    [Symbol.iterator](): this;
}
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