export interface ParserOptions {
    keepHistory?: boolean | undefined;
    lexer?: Lexer | undefined;
    [key: string]: any;
}
export interface CompiledRules {
    Lexer?: Lexer | undefined;
    ParserStart: string;
    ParserRules: ParserRule[];
}
export interface ParserRule {
    name: string;
    symbols: any[];
    postprocess?: Postprocessor | undefined;
}
export declare type Postprocessor = (data: any[], reference?: number, wantedBy?: {}) => any;
export interface Lexer {
    /**
     * Sets the internal buffer to data, and restores line/col/state info taken from save().
     */
    reset(data: string, state?: LexerState): void;
    /**
     * Returns e.g. {type, value, line, col, …}. Only the value attribute is required.
     */
    next(): Token | undefined;
    /**
     * Returns an object describing the current line/col etc. This allows us
     * to preserve this information between feed() calls, and also to support Parser#rewind().
     * The exact structure is lexer-specific; nearley doesn't care what's in it.
     */
    save(): LexerState;
    /**
     * Returns a string with an error message describing the line/col of the offending token.
     * You might like to include a preview of the line in question.
     */
    formatError(token: Token, message: string): string;
}
export declare type Token = string | {
    value: string;
};
export interface LexerState {
    [x: string]: any;
}