How to emit a signal passed to a function

[ChrisW67]

Why are you trying to reinvent this wheel? Each caller of QNetworkAccessManager::get() is given a QNetworkReply object. They can connect that object's QNetworkReply::finished() signal to any slot they want executed, or to any signal they want emitted, independent of any other reply object.

[scieck]

I am not trying to reinvent the wheel, I just did not realized that QNetworkReply is also emitting the finished signal.

[anda_skoa]

In case you ever need this in a different context, don't pass a signal but a slot.

If you have receiver object and a slot name you can easily use QMetaObject::invokeMethod() to call that slot.
Even with arguments.

Cheers,
_

[Kryzon]

If I'm not mistaken a signal is just a member function, so you should able to store pointers to the signals instead of their const char* representation.
See this for information: http://stackoverflow.com/a/15176860/4206247

You also need the instance of the QObject that is emitting it.