Re: [boost] [signals]: Making copies of a slot

From: Doug Gregor (dgregor_at_[hidden])
Date: 2004-09-23 16:42:33

On Sep 23, 2004, at 5:54 AM, Jody Hagins wrote:

> Repost since a week has gone by without response (which seems like an
> eternity on this list ;-).

Sorry, I've been (and am) on the road.

>> AFICT, the rationale for copying a slot is missing, hence the
>> following questions...
>>
>>
>>   boost::signal<void (int)> some_signal;
>>   Some_Slot slot1;
>>   some_signal.connect(slot1);
>>   Some_Slot slot2(slot1);
>>   some_signal(42);
>>
>>
>>
>> The above code will only signal slot1.  If slot2 is a copy of slot1,
>> should it also get the signal?  I know it does not work that way, but
>> I was wondering why that decision was made.  Also, if I *do* want the
>> copy to receive the same signals, how can I do so?

Just connect both slots to the signal?

        some_signal.connect(slot2);

I'm not really sure how to answer the question. It seems _very_ odd to 
me to expect that both slot1 & slot2 be connected to some_signal 
through a single call to connect.

        Doug