import { JSONSchema7 } from 'json-schema';
import { JSONSchemaFormatOptions, CompactJSONFormat, P_MAIN } from './typings';
/**
 * Main Parser class, wraps nearley parser main methods.
 */
export declare class Parser {
    private compiledGrammar;
    private parser;
    private jsonSchemaFormatter;
    private compactFormatter;
    /**
     * Parsed statements.
     */
    private statements;
    /**
     * Remains of string feed, after last parsed statement.
     */
    private remains;
    /**
     * Whether preparser is currently escaped.
     */
    private escaped;
    /**
     * Current quote char of preparser.
     */
    private quoted;
    /**
     * Parser constructor.
     * Default dialect is 'mysql'.
     *
     * @param dialect SQL dialect ('mysql' or 'mariadb' currently supported).
     */
    constructor(dialect?: 'mysql' | 'mariadb');
    /**
     * Feed chunk of string into parser.
     *
     * @param chunk Chunk of string to be parsed.
     */
    feed(chunk: string): Parser;
    /**
     * Recreates NearleyParser using grammar given in constructor.
     */
    resetParser(): void;
    /**
     * Checks whether character is a quotation character.
     *
     * @param char Character to be evaluated.
     */
    private static isQuoteChar;
    /**
     * Tidy parser results.
     *
     * @param results Parser results.
     */
    private static tidy;
    /**
     * Parser results getter. Will run nearley parser on string fed to this parser.
     */
    get results(): P_MAIN;
    /**
     * Formats given parsed JSON to a compact format.
     * If no JSON is given, will use currently parsed SQL.
     *
     * @param json Parsed JSON format.
     */
    toCompactJson(json?: P_MAIN): CompactJSONFormat[];
    /**
     * Formats parsed SQL to an array of JSON Schema documents,
     * where each item is the JSON Schema of a table. If no
     * tables are given, will use currently parsed SQL.
     *
     * @param tables Array of tables in compact JSON format.
     * @param options Options available to format as JSON Schema.
     */
    toJsonSchemaArray(options?: JSONSchemaFormatOptions, tables?: CompactJSONFormat[]): JSONSchema7[];
}