/**
 * Fast character classification utilities for SQL tokenization
 */
export declare class CharLookupTable {
    static isWhitespace(char: string): boolean;
    static isDigit(char: string): boolean;
    static isHexChar(char: string): boolean;
    static isOperatorSymbol(char: string): boolean;
    static isDelimiter(char: string): boolean;
    static isNamedParameterPrefix(char: string): boolean;
}