import { BaseOutputParser } from "@langchain/core/output_parsers";
import type { SerializedFields } from "../load/map_keys.js";
export interface RegExpFields {
    pattern: string;
    flags?: string;
}
/**
 * Interface for the fields required to create a RegexParser instance.
 */
export interface RegexParserFields {
    regex: string | RegExp | RegExpFields;
    outputKeys: string[];
    defaultOutputKey?: string;
}
/**
 * Class to parse the output of an LLM call into a dictionary.
 * @augments BaseOutputParser
 */
export declare class RegexParser extends BaseOutputParser<Record<string, string>> {
    static lc_name(): string;
    lc_namespace: string[];
    lc_serializable: boolean;
    get lc_attributes(): SerializedFields | undefined;
    regex: string | RegExp;
    outputKeys: string[];
    defaultOutputKey?: string;
    constructor(fields: RegexParserFields);
    constructor(regex: string | RegExp, outputKeys: string[], defaultOutputKey?: string);
    _type(): string;
    /**
     * Parses the given text using the regex pattern and returns a dictionary
     * with the parsed output. If the regex pattern does not match the text
     * and no defaultOutputKey is provided, throws an OutputParserException.
     * @param text The text to be parsed.
     * @returns A dictionary with the parsed output.
     */
    parse(text: string): Promise<Record<string, string>>;
    /**
     * Returns a string with instructions on how the LLM output should be
     * formatted to match the regex pattern.
     * @returns A string with formatting instructions.
     */
    getFormatInstructions(): string;
}