export declare function isIdentifierStartChar(char: number, nextChar?: number): boolean;
export declare function isIdentifierChar(char: number, nextChar?: number): boolean;
export declare function isSurrogateChar(char: number): boolean;
export declare function isWhiteSpace(ch: number): boolean;
export declare function isLineBreak(ch: number): boolean;
export declare function isNumber(ch: number): boolean;
export declare function isDecimal(ch: number): boolean;
export declare function isHex(ch: number): boolean;
export declare function isOctal(ch: number): boolean;
export declare function isBinary(ch: number): boolean;