/**
 * Abstract base class for parsers that transform input items to output items.
 * Provides a common interface for feeding input and generating output.
 *
 * @typeParam I - The input item type
 * @typeParam O - The output item type
 */
export declare abstract class Parser<I, O> {
    /**
     * Feeds input items to the parser.
     *
     * @param input - Input items to process
     */
    abstract feed(...input: I[]): void;
    /**
     * Generates output items from the fed input.
     *
     * @returns A generator yielding output items
     */
    abstract nextItems(): Generator<O>;
}