import { GrammarObject, GrammarProduction, HCG3ProductionBody, HCG3Symbol } from "../types/grammar_nodes.js";
export declare const enum ItemIndex {
    body_id = 0,
    length = 1,
    offset = 2,
    state = 3
}
export declare class ItemGraphNode {
    subitems: ItemGraphNode[];
    supitems: ItemGraphNode[];
    item: Item;
    id?: number;
    name?: string;
    /**
     * Higher score represents a greater depth from the root nodes.
     */
    score?: number;
}
/**
 * Represents a state within a production body, with an offset
 * indicating the current considered symbol of the body. If offset
 * is the same as the number symbols that make up the body, then
 * the Item is at the END state of the body. An item item that is
 * at the END state indicates a successful parse of the production
 * body.
 */
export declare class Item extends Array {
    static fromString(str: string): Item;
    static fromArray(array: Array<any>): Item;
    constructor(body_id: number, length: number, offset: number, state?: number);
    get atEND(): boolean;
    get id(): string;
    get body(): number;
    get len(): number;
    get state(): number;
    get offset(): number;
    copy(body?: number, length?: number, offset?: number, state?: number): Item;
    body_(grammar: GrammarObject): HCG3ProductionBody;
    sym(grammar: GrammarObject): HCG3Symbol;
    render(grammar: GrammarObject): string;
    renderUnformatted(grammar: GrammarObject): string;
    rup(grammar: any): string;
    renderUnformattedWithProduction(grammar: GrammarObject): string;
    getProductionID(grammar: GrammarObject): number;
    getProduction(grammar: GrammarObject): GrammarProduction;
    getProductionAtSymbol(grammar: GrammarObject): GrammarProduction;
    /**
     * Returns the item incremented to its final position.
     * @returns Item
     */
    toEND(): Item;
    increment(): Item | null;
    decrement(): Item | null;
    match(item: Item): boolean;
    toString(): string;
    /**
     * returns new Item that is a copy of this except
     * depth is set to d
     */
    toState(d: number): Item;
}
export declare function getGotoItems(grammar: GrammarObject, active_productions: number[], items: Item[], out?: Item[], all?: boolean): Item[];
export declare function itemsToProductionIDs(items: Item[], grammar: GrammarObject): number[];
export declare function Items_Have_The_Same_Active_Symbol(items: Item[], grammar: GrammarObject): boolean;