import { EmptyObject } from './Interfaces';
export declare function escape(html: string, encode?: boolean): string;
export declare function unescape(html: string): string;
declare class Slugger {
    seen: EmptyObject;
    slug(value: string, isUnique?: boolean): string;
}
export declare const slugger: Slugger;
export declare function rtrim(str: string, c: string, invert?: boolean): string;
export declare function resolveUrl(base: string, href: string): string;
export declare function cleanUrl(sanitize: boolean, base: string, href: string): string;
export declare class ExtendRegexp {
    private source;
    private flags;
    constructor(regex: RegExp, flags?: string);
    setGroup(groupName: RegExp | string, groupRegexp: RegExp | string): this;
    getRegex(): RegExp;
}
export declare const noopRegex: RegExp;
export declare function getBreakChar(regExp: RegExp): string;
export declare function getRuleType(regExp: RegExp): string;
export declare function isBlockRule(regExp: RegExp): boolean;
export declare const blockCommentRegex: RegExp;
export {};