import { nat } from "things";
import { Parser } from "./parser.js";
import { Text } from "./textlines.js";
/** Returns the length after a successful parse, and a negative number if unsuccessful. */
export type Lexer = (text: Text, column: nat) => number;
export declare function nullP<State, T>(parser: Parser<State, T>, state: State): Parser<null, T>;
export declare function parserL<T>(parser: Parser<null, T>): Lexer;