const { CtxexpParser } = require("ctxexp-parser");
// import { CtxexpParser } from "ctxexp-parser";

const $ = {
  a: "hello",
  fn(str, str2) {
    return str + str2;
  },
  runs(...cbs) {
    return cbs.map((cb, index) => cb(index));
  },
  Type(i) {
    return ["A", "D", "C"][i];
  },
};

const exp = `$.a`;
const res = new CtxexpParser($, exp).exec();
console.log(res); // hello

const exp1 = `$.fn($.a," cxtexp")`;
const res1 = new CtxexpParser($, exp1).exec();
console.log(res1); // hello cxtexp

const exp2 = `$.runs((i)=>$.Type(i)).join("")`;
const res2 = new CtxexpParser($, exp2).exec();
console.log(res2); // A