text: var __extends = (this && this.__extends) || function (d, b) {
      for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
      function __() { this.constructor = d; }
      d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
  };
  define(["require", "exports", '../Subscriber', '../util/tryCatch', '../util/errorObject', '../util/bindCallback'], function (require, exports, Subscriber_1, tryCatch_1, errorObject_1, bindCallback_1) {
      function distinctUntilChanged(compare, thisArg) {
          return this.lift(new DistinctUntilChangedOperator(thisArg ?
              bindCallback_1.default(compare, thisArg, 2) :
              compare));
      }
      Object.defineProperty(exports, "__esModule", { value: true });
      exports.default = distinctUntilChanged;
      var DistinctUntilChangedOperator = (function () {
          function DistinctUntilChangedOperator(compare) {
              this.compare = compare;
          }
          DistinctUntilChangedOperator.prototype.call = function (subscriber) {
              return new DistinctUntilChangedSubscriber(subscriber, this.compare);
          };
          return DistinctUntilChangedOperator;
      })();
      var DistinctUntilChangedSubscriber = (function (_super) {
          __extends(DistinctUntilChangedSubscriber, _super);
          function DistinctUntilChangedSubscriber(destination, compare) {
              _super.call(this, destination);
              this.hasValue = false;
              if (typeof compare === "function") {
                  this.compare = compare;
              }
          }
          DistinctUntilChangedSubscriber.prototype.compare = function (x, y) {
              return x === y;
          };
          DistinctUntilChangedSubscriber.prototype._next = function (x) {
              var result = false;
              if (this.hasValue) {
                  result = tryCatch_1.default(this.compare)(this.value, x);
                  if (result === errorObject_1.errorObject) {
                      this.destination.error(errorObject_1.errorObject.e);
                      return;
                  }
              }
              else {
                  this.hasValue = true;
              }
              if (Boolean(result) === false) {
                  this.value = x;
                  this.destination.next(x);
              }
          };
          return DistinctUntilChangedSubscriber;
      })(Subscriber_1.default);
  });
  //# sourceMappingURL=distinctUntilChanged.js.map