import { Pos } from './position.js';
export declare enum TokenType {
    SPACE = 0,
    NEWLINE = 1,
    ATOM = 2,
    STRING = 3,
    OPEN = 4,
    CLOSE = 5
}
export interface TokenBase {
    start: Pos;
    end: Pos;
    synthetic?: boolean;
}
export interface Token extends TokenBase {
    type: TokenType;
    text: string;
}
export interface Group extends TokenBase {
    open: Token;
    close: Token | null;
    items: Items;
}
export type Item = Token | Group;
export type Items = Array<Item>;
export type GroupInProgress = Omit<Group, 'end'>;
export declare function getRange(t: Item | Items): TokenBase;
export declare function finishGroup(g: GroupInProgress, end: Pos): Group;
export declare function makeGroup(open: Token, items: Array<Item>, close: Token): Group;
export declare function isSpace(i: Item): i is Token;
export declare function isGroup(i: Item): i is Group;
export declare function isToken(i: Item): i is Token;
export declare function isTokenType(i: Item, t: TokenType): i is Token;
export type ItemTextOptions = {
    missing?: string;
    color?: boolean;
};
export declare function foldItems<T>(i: Items, fToken: (t: Token) => T, fGroup: (g: Group, t: T, k: (t: Token) => T) => T, fItems: (ts: T[]) => T): T;
export declare function itemText(items: Items, options?: ItemTextOptions): string;