hunk.code_window:   "typings": "./index.d.ts",
     "main": "./index.js",
     "module": "../_esm5/ajax/index.js",
     "es2015": "../_esm2015/ajax/index.js"
   }
hunk.labels: keep keep keep replace keep
hunk.after_edit:   "es2015": "../_esm2015/ajax/index.js",
     "sideEffects": false
  
hunk.file_path: src/ajax/package.json
hunk.type: replace
file: import { Subject } from '../../Subject';
  import { Observable } from '../../Observable';
  import { ConnectableObservable } from '../../observable/ConnectableObservable';
  import { multicast as higherOrder } from '../../operators/multicast';
  import { FactoryOrValue, MonoTypeOperatorFunction, OperatorFunction } from '../../../internal/types';
  
  /* tslint:disable:max-line-length */
  export function multicast<T>(this: Observable<T>, subjectOrSubjectFactory: FactoryOrValue<Subject<T>>): ConnectableObservable<T>;
  export function multicast<T>(SubjectFactory: (this: Observable<T>) => Subject<T>): ConnectableObservable<T>;
  export function multicast<T>(SubjectFactory: (this: Observable<T>) => Subject<T>, selector: MonoTypeOperatorFunction<T>): Observable<T>;
  export function multicast<T, R>(SubjectFactory: (this: Observable<T>) => Subject<T>): ConnectableObservable<R>;
  export function multicast<T, R>(SubjectFactory: (this: Observable<T>) => Subject<T>, selector: OperatorFunction<T, R>): Observable<R>;
  /* tslint:enable:max-line-length */
  
  /**
   * Allows source Observable to be subscribed only once with a Subject of choice,
   * while still sharing its values between multiple subscribers.
   *
   * <span class="informal">Subscribe to Observable once, but send its values to multiple subscribers.</span>
   *
   * <img src="./img/multicast.png" width="100%">
   *
   * `multicast` is an operator that works in two modes.
   *
   * In the first mode you provide a single argument to it, which can be either an initialized Subject or a Subject
   * factory. As a result you will get a special kind of an Observable - a {@link ConnectableObservable}. It can be
   * subscribed multiple times, just as regular Observable, but it won't subscribe to the source Observable at that
   * moment. It will do it only if you call its `connect` method. This means you can essentially control by hand, when
   * source Observable will be actually subscribed. What is more, ConnectableObservable will share this one subscription
   * between all of its subscribers. This means that, for example, `ajax` Observable will only send a request once,
   * even though usually it would send a request per every subscriber. Since it sends a request at the moment of
   * subscription, here request would be sent when the `connect` method of a ConnectableObservable is called.
   *
   * The most common pattern of using ConnectableObservable is calling `connect` when the first consumer subscribes,
   * keeping the subscription alive while several consumers come and go and finally unsubscribing from the source
   * Observable, when the last consumer unsubscribes. To not implement that logic over and over again,
   * ConnectableObservable has a special operator, `refCount`. When called, it returns an Observable, which will count
   * the number of consumers subscribed to it and keep ConnectableObservable connected as long as there is at least
   * one consumer. So if you don't actually need to decide yourself when to connect and disconnect a
   * ConnectableObservable, use `refCount`.
   *
   * The second mode is invoked by calling `multicast` with an additional, second argument - selector function.
   * This function accepts an Observable - which basically mirrors the source Observable - and returns Observable
   * as well, which should be the input stream modified by any operators you want. Note that in this
   * mode you cannot provide initialized Subject as a first argument - it has to be a Subject factory. If
   * you provide selector function, `multicast` returns just a regular Observable, instead of ConnectableObservable.
   * Thus, as usual, each subscription to this stream triggers subscription to the source Observable. However,
   * if inside the selector function you subscribe to the input Observable multiple times, actual source stream
   * will be subscribed only once. So if you have a chain of operators that use some Observable many times,
   * but you want to subscribe to that Observable only once, this is the mode you would use.
   *
   * Subject provided as a first parameter of `multicast` is used as a proxy for the single subscription to the
   * source Observable. It means that all values from the source stream go through that Subject. Thus, if a Subject
   * has some special properties, Observable returned by `multicast` will have them as well. If you want to use
   * `multicast` with a Subject that is one of the ones included in RxJS by default - {@link Subject},
   * {@link AsyncSubject}, {@link BehaviorSubject}, or {@link ReplaySubject} - simply use {@link publish},
   * {@link publishLast}, {@link publishBehavior} or {@link publishReplay} respectively. These are actually
   * just wrappers around `multicast`, with a specific Subject hardcoded inside.
   *
   * Also, if you use {@link publish} or {@link publishReplay} with a ConnectableObservables `refCount` operator,
   * you can simply use {@link share} and {@link shareReplay} respectively, which chain these two.
   *
   * @example <caption>Use ConnectableObservable</caption>
   * const seconds = Rx.Observable.interval(1000);
   * const connectableSeconds = seconds.multicast(new Subject());
   *
   * connectableSeconds.subscribe(value => console.log('first: ' + value));
   * connectableSeconds.subscribe(value => console.log('second: ' + value));
   *
   * // At this point still nothing happens, even though we subscribed twice.
   *
   * connectableSeconds.connect();
   *
   * // From now on `seconds` are being logged to the console,
   * // twice per every second. `seconds` Observable was however only subscribed once,
   * // so under the hood Observable.interval had only one clock started.
   *
   * @example <caption>Use selector</caption>
   * const seconds = Rx.Observable.interval(1000);
   *
   * seconds
   *     .multicast(
   *         () => new Subject(),
   *         seconds => seconds.zip(seconds) // Usually zip would subscribe to `seconds` twice.
   *                                         // Because we are inside selector, `seconds` is subscribed once,
   *     )                                   // thus starting only one clock used internally by Observable.interval.
   *     .subscribe();
   *
   * @see {@link publish}
   * @see {@link publishLast}
   * @see {@link publishBehavior}
   * @see {@link publishReplay}
   * @see {@link share}
   * @see {@link shareReplay}
   *
   * @param {Function|Subject} subjectOrSubjectFactory - Factory function to create an intermediate Subject through
   * which the source sequence's elements will be multicast to the selector function input Observable or
   * ConnectableObservable returned by the operator.
   * @param {Function} [selector] - Optional selector function that can use the input stream
   * as many times as needed, without causing multiple subscriptions to the source stream.
   * Subscribers to the input source will receive all notifications of the source from the
   * time of the subscription forward.
   * @return {Observable<T>|ConnectableObservable<T>} An Observable that emits the results of invoking the selector
   * on the source stream or a special {@link ConnectableObservable}, if selector was not provided.
   *
   * @method multicast
   * @owner Observable
   */
  export function multicast<T, R>(this: Observable<T>, subjectOrSubjectFactory: Subject<T> | (() => Subject<T>),
                                  selector?: (source: Observable<T>) => Observable<R>): ConnectableObservable<R> | Observable<R> {
    return higherOrder(<any>subjectOrSubjectFactory, selector)(this);
  }
  