import type { Maybe, Token } from "../types";
export declare class ASTNode {
    private _token;
    private _left;
    private _right;
    constructor(token: Token);
    get token(): Token;
    get left(): Maybe<ASTNode>;
    get right(): Maybe<ASTNode>;
    setRight(node: ASTNode): this;
    setLeft(node: ASTNode): this;
    /**
     * Recursively converts the ASTNode to a JSON object.
     * @example
     * build("1 + 2").toJSON();
     * @returns
     */
    toJSON(): Record<string, unknown>;
}
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