Re: [Boost-Users] Signal/Slot copy semantics.

From: Douglas Gregor (gregod_at_[hidden])
Date: 2003-04-16 08:51:17

On Wednesday 16 April 2003 08:26 am, Jesper Bojesen wrote:
> My problem is that the object signalled is not the same object that I
> subscribed to the signal.
>
> Is this really what was inteded ?

Yes.

> Is the any rationale behind this behaviour ?

Yes. In STL, function objects are copied around at will, so Signals picks up 
that part of the function object concept. 

If you want Signals to keep a reference to a function object (instead of 
making a copy), use boost::ref:
  sig.connect(boost::ref(hello));

        Doug