ReplaySubject shouldn't keep it's values after all subscriptions are removed

[tcldr]

ReplaySubject shouldn't keep it's values after all subscriptions are removed

[sherlock1982]

Thank you very much. Finally it works as expected at least for me :-)

[tcldr]

Hi @sherlock1982,

Yes, that's because RxJava and other implementations use referenceCounted() instead of autoconnect() in their share(replay:) implementations.

With a referenceCounted() operator there is no need for additional logic in ReplaySubject and therefore any subject that wants to provide this kind of functionality is able to.

I was unsure whether or not Combine had a method of recreating the behaviour of the refCount() operator and after further investigation it appears it does not.

So, in the meantime I've added a new referenceCounted() operator specifically for Multicast publishers. (Ideally it would work for all ConnectablePublishers but the protocol doesn't provide the necessary API for the task.)

Currently available on the master brach.