Re: [Boost-users] bind/function: composition

From: Edward Diener (eldiener_at_[hidden])
Date: 2006-10-02 07:51:04

Johan Torp wrote:
> I often tend to have interfaces which take a boost::function<void()> 
> that is to be called when an event occurs. Quite often I need make two 
> separate function calls as response to one event. In these cases I 
> usually solve the problem using the following technique:
> 
> void foo();
> void bar();
> 
> void call_two(const boost::function<void ()>& one,  const 
> boost::function<void ()>& two)
> {  one();  two(); }
> 
> boost::function<void ()> on_event = boost::bind(&call_two, 
> boost::bind(&foo), boost::bind(&bar));

Why not just use Boost Signals to have a single signal just call your 
two different slots of foo and bar ? It seems you are unnecessarily 
trying to re-invent a wheel which has already been re-invented by the 
signals library.