import { Token } from './Token.js';
/**
 * LT Language Lexer
 * Converts source code into tokens
 */
export declare class Lexer {
    private source;
    private tokens;
    private pos;
    private line;
    private column;
    constructor(source: string);
    tokenize(): Token[];
    private scanToken;
    private readOperator;
    private readLongString;
    private readString;
    private readNumber;
    private readIdentifier;
    private skipWhitespace;
    private skipComment;
    private addToken;
    private current;
    private peek;
    private peekNext;
    private advance;
    private isEOF;
    private isDigit;
    private isAlpha;
    private isAlphaNumeric;
}