import { Lexeme, TokenType } from '../models/Lexeme';
/**
 * Base class for token readers
 */
export declare abstract class BaseTokenReader {
    protected input: string;
    protected position: number;
    constructor(input: string, position?: number);
    /**
     * Get the current position in the input
     */
    getPosition(): number;
    /**
     * Set the position in the input
     */
    setPosition(position: number): void;
    /**
     * Check if we've reached the end of input
     */
    protected isEndOfInput(shift?: number): boolean;
    /**
     * Check if we can read more characters
     */
    protected canRead(shift?: number): boolean;
    /**
     * Read an expected character
     */
    protected read(expectChar: string): string;
    /**
     * Create a lexeme with the specified type and value
     */
    protected createLexeme(type: TokenType, value: string, comments?: string[] | null): Lexeme;
    /**
     * Get debug info for error reporting
     */
    protected getDebugPositionInfo(errPosition: number): string;
    /**
     * Try to read a token from the current position
     * @param previous The previous token, if available
     * @returns The read token or null if no token could be read
     */
    abstract tryRead(previous: Lexeme | null): Lexeme | null;
}