const bb =()=> new Promise(res => {
        setTimeout(()=>res(),100)
    })
const aa = async () => {
    let cc = bb()
    let dd = await bb()
}


var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) { // 这种写法，如果有awaiter,就不再重新定义
  return new (P || (P = Promise))(function (resolve, reject) { // promise的excutor函数
    function fulfilled(value) {
      try {
        step(generator.next(value));
      } catch (e) {
        reject(e);
      }
    }
    function rejected(value) {
      try {
        step(generator["throw"](value));
      } catch (e) {
        reject(e);
      }
    }
    function step(result) {
      result.done ?
        resolve(result.value) :
        new P(
          function (resolve) {
            resolve(result.value);
          }).then(
            fulfilled,
            rejected)
        ;
    }
    step((generator = generator.apply(thisArg, _arguments || [])).next());
  });
};

var __generator = (this && this.__generator) || function (thisArg, body) {
  var _ = {
    label: 0,
    sent: function () {
      if (t[0] & 1) throw t[1];
      return t[1];
    },
    trys: [],
    ops: []
  }
  var f, y, t, g;
  return g = {
    next: verb(0),
    "throw": verb(1),
    "return": verb(2)
  }, typeof Symbol === "function" && (g[Symbol.iterator] = function () { return this; }), g;
  function verb(n) { return function (v) { return step([n, v]); }; }
  function step(op) {
    if (f) throw new TypeError("Generator is already executing.");
    while (_) try {
      if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
      if (y = 0, t) op = [op[0] & 2, t.value];
      switch (op[0]) {
        case 0: case 1: t = op; break;
        case 4: _.label++; return { value: op[1], done: false };
        case 5: _.label++; y = op[1]; op = [0]; continue;
        case 7: op = _.ops.pop(); _.trys.pop(); continue;
        default:
          if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
          if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
          if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
          if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
          if (t[2]) _.ops.pop();
          _.trys.pop(); continue;
      }
      op = body.call(thisArg, _);
    } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
    if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
  }
};


var _this = this;
var bb = function () {
  return new Promise(function (res) {
    setTimeout(function () { return res(); }, 100);
  });
};
var aa = function () {
  return __awaiter( // 四个参数
    _this,
    void 0,
    void 0,
    function () {
      var cc, dd;
      return __generator(this, function (_a) {
        switch (_a.label) {
          case 0:
            cc = bb();
            return [4 /*yield*/, bb()];
          case 1: // 处理异步逻辑，如果异步逻辑后面还有逻辑，都放到 _a.sent()之后
            dd = _a.sent();
            return [2 /*return*/];
        }
      });
    }
  );
};