import { ESLMediaQuery } from './esl-media-query';
export type RulePayloadParser<T> = (val: string) => T | undefined;
/**
 * ESL Media Rule
 * @author Yuliya Adamskaya
 *
 * Helper class to wrap {@link ESLMediaQuery} with the payload value
 * @see ESLMediaQuery
 * @see ESLMediaRuleList
 */
export declare class ESLMediaRule<T = any> {
    readonly query: ESLMediaQuery;
    readonly payload: T;
    constructor(payload: T, query?: string);
    /** @returns if the inner {@link ESLMediaQuery} is matching current device configuration */
    get matches(): boolean;
    /** Subscribes on inner {@link ESLMediaQuery} changes */
    addEventListener(callback: EventListener): void;
    addEventListener(type: 'change', callback: EventListener): void;
    /** Unsubscribes from inner {@link ESLMediaQuery} changes */
    removeEventListener(callback: EventListener): void;
    removeEventListener(type: 'change', callback: EventListener): void;
    toString(): string;
    /**
     * Creates the {@link ESLMediaRule} instance from payload string, query and valueParser.
     * If the payload parse result is undefined then rule will be undefined.
     */
    static create<U>(payload: string, query: string, parser: RulePayloadParser<U>): ESLMediaRule<U> | undefined;
    /** Parses the rule string to the {@link ESLMediaRule} instance */
    static parse<U>(lex: string, parser: RulePayloadParser<U>): ESLMediaRule<U> | undefined;
    /** Shortcut to create always active {@link ESLMediaRule} with passed value */
    static all<U>(payload: U): ESLMediaRule<U>;
    /** Shortcut to create always inactive {@link ESLMediaRule} */
    static empty(): ESLMediaRule<undefined>;
}