import { ILeftRecursiveRuleAltInfo } from "../analysis/ILeftRecursiveRuleAltInfo.js";
import { OrderedHashMap } from "../misc/OrderedHashMap.js";
import { Grammar } from "./Grammar.js";
import { Rule } from "./Rule.js";
import { AltAST } from "./ast/AltAST.js";
import type { GrammarAST } from "./ast/GrammarAST.js";
import { RuleAST } from "./ast/RuleAST.js";
export declare class LeftRecursiveRule extends Rule {
    /** Did we delete any labels on direct left-recur refs? Points at ID of ^(= ID el) */
    leftRecursiveRuleRefLabels: [GrammarAST, string | undefined][];
    recPrimaryAlts: ILeftRecursiveRuleAltInfo[];
    recOpAlts: OrderedHashMap<number, ILeftRecursiveRuleAltInfo>;
    private originalAST;
    constructor(g: Grammar, name: string, ast: RuleAST);
    hasAltSpecificContexts(): boolean;
    getOriginalNumberOfAlts(): number;
    getOriginalAST(): RuleAST;
    getUnlabeledAltASTs(): AltAST[] | null;
    /**
     * @returns an array that maps predicted alt from primary decision to original alt of rule. For following rule,
     * returns [0, 2, 4]
     *
     * ```antlr
     * e : e '*' e
     *   | INT
     *   | e '+' e
     *   | ID
     *   ;
     * ```
     *
     * That maps predicted alt 1 to original alt 2 and predicted 2 to alt 4.
     */
    getPrimaryAlts(): number[];
    /**
     * @returns an array that maps predicted alt from recursive op decision to original alt of rule. For following rule,
     * returns [0, 1, 3]
     *
     * ```antlr
     * e : e '*' e
     *   | INT
     *   | e '+' e
     *   | ID
     *   ;
     * ```
     * That maps predicted alt 1 to original alt 1 and predicted 2 to alt 3.
     */
    getRecursiveOpAlts(): number[];
    /** @returns labels from those alts we deleted for left-recursive rules. */
    getAltLabels(): Map<string, Array<[number, AltAST]>> | null;
}