export declare const markdownSpecial: Set<string>;
export declare function isPunctuationCharacter(char: any): boolean;
export declare function isNumeric(char: string): boolean;
export declare function isCJK(char: any): boolean;
export declare function isFullwidthPunctuation(char: any): boolean;
export declare function isBlank(char: string): boolean;
export declare function isInlineBlank(char: string): boolean;
export declare function isAlphabet(char: any): boolean;
export declare function isWordBoundary(char: any): boolean;
export declare function isEndCharacter(char: any): boolean;
export declare function isStartCharacter(char: any): boolean;