import type { Position, Range } from './types';
/**
 * Token types for nginx configuration
 */
export declare enum TokenType {
    LBRACE = "LBRACE",// {
    RBRACE = "RBRACE",// }
    SEMICOLON = "SEMICOLON",// ;
    WORD = "WORD",// unquoted word/identifier
    QUOTED_STRING = "QUOTED_STRING",// "..." or '...'
    VARIABLE = "VARIABLE",// $variable
    COMMENT = "COMMENT",// # comment
    NEWLINE = "NEWLINE",
    EOF = "EOF"
}
/**
 * Token represents a single lexical unit
 */
export interface Token {
    type: TokenType;
    value: string;
    range: Range;
}
/**
 * Lexer for nginx configuration files
 */
export declare class Lexer {
    private input;
    private pos;
    private line;
    private column;
    private tokens;
    constructor(input: string);
    /**
     * Tokenize the entire input
     */
    tokenize(): Token[];
    private scanToken;
    private scanComment;
    private scanQuotedString;
    private scanVariable;
    private scanWord;
    private skipWhitespace;
    private isWordChar;
    private isVariableChar;
    private peek;
    private peekNext;
    private advance;
    private isAtEnd;
    private addToken;
    private makeRange;
    /**
     * Get current position for error reporting
     */
    getPosition(): Position;
}