import Token from "../classes/Token";
import Grammar from "../grammar/grammar";
import { GrammarRuleContent } from "../grammar/rule";
export declare type RuleVariationContentStackItem = {
    content: GrammarRuleContent;
    type: ContentStackType;
    index: number;
};
export declare type RuleVariationContentStack = RuleVariationContentStackItem[];
export declare enum ContentStackType {
    RULE = 0,
    BINARY = 1,
    BLOCK = 2
}
export default class Parser {
    tokens: Token[];
    index: number;
    grammar: Grammar;
    /** The main parser object. Takes the grammar object as a constructor argument */
    constructor(grammar: Grammar);
    /** Takes an array of tokens and constructs an AST tree based on the grammar rules */
    parse(tokens: Token[]): any;
    private evaluateRule;
    private evaluateOnePiece;
    private advance;
    private rollback;
    private stackLayer;
    private get currentTok();
}