import { type Array2 } from '../types/array/module.f.ts';
/**
 * A range of symbols (48 bits)
 * For example: 0xBBBBBB_EEEEEE
 * - 0xBBBBBB is the first symbol
 * - 0xEEEEEE is the last symbol
 */
export type TerminalRange = number;
/** A sequence of rules. */
export type Sequence = readonly Rule[];
/** A variant */
export type Variant = {
    readonly [k in string]: Rule;
};
export type DataRule = Variant | Sequence | TerminalRange | string;
export type LazyRule = () => DataRule;
export type Rule = DataRule | LazyRule;
export declare const max: string;
export declare const rangeEncode: (a: number, b: number) => TerminalRange;
export declare const oneEncode: (a: number) => TerminalRange;
export declare const rangeDecode: (r: number) => Array2<number>;
export declare const toSequence: (s: string) => readonly TerminalRange[];
export declare const str: (s: string) => readonly TerminalRange[] | TerminalRange;
export declare const set: (s: string) => RangeVariant;
export declare const range: (ab: string) => TerminalRange;
/**
 * A set of terminal ranges compatible with the `Variant` rule.
 */
export type RangeVariant = {
    readonly [k in string]: TerminalRange;
};
export declare const rangeToId: (r: TerminalRange) => string;
export declare const remove: (range: TerminalRange, removeSet: RangeVariant) => RangeVariant;
export type None = readonly [];
export declare const none: None;
export type Option<S> = {
    none: None;
    some: S;
};
export declare const option: <S extends Rule>(some: S) => Option<S>;
export type Repeat0Plus<T> = () => Option<readonly [T, Repeat0Plus<T>]>;
/**
 * Repeat zero or more times.
 *
 * https://english.stackexchange.com/questions/506480/single-word-quantifiers-for-zero-or-more-like-cardinalities
 * - zero or more - any, 0Plus
 * - one or more - several, 1Plus
 *
 * Also see: https://arbs.nzcer.org.nz/types-numbers
 */
export declare const repeat0Plus: <T extends Rule>(some: T) => Repeat0Plus<T>;
export type Repeat1Plus<T> = readonly [T, Repeat0Plus<T>];
/**
 * Repeat one or more times.
 */
export declare const repeat1Plus: <T extends Rule>(some: T) => Repeat1Plus<T>;
export type Join1Plus<T, S> = readonly [T, Repeat0Plus<readonly [S, T]>];
export declare const join1Plus: <T extends Rule, S extends Rule>(some: T, separator: S) => Join1Plus<T, S>;
export type Join0Plus<T, S> = Option<readonly [T, Repeat0Plus<readonly [S, T]>]>;
export declare const join0Plus: <T extends Rule, S extends Rule>(some: T, separator: S) => Rule;
export type Repeat<T> = readonly T[];
export declare const repeat: (n: number) => <T extends Rule>(some: T) => Repeat<T>;
export declare const isEmpty: (rule: Rule) => boolean;