Re: [boost] Boost.Multimethod proposal

Subject: Re: [boost] Boost.Multimethod proposal
From: Edward Diener (eldiener_at_[hidden])
Date: 2009-08-22 21:45:14

Nicholas Howe wrote:
> On Sat, Aug 22, 2009 at 3:35 PM, Robert Ramey <ramey_at_[hidden]> wrote:
> 
>> How would this differ from the signals/slots library?
>>
> 
> The difference is that when invoked, a multimethod selects a single best
> registered method implementation based on the dynamic types of its
> parameters, whereas signal calls all of its registered methods, which accept
> parameters of the same type.

What is a practical use for multi-methods ?

Why would I register similar methods with a multi-method implementation 
and then let the implementation choose a "best registered method" when I 
invode a method through the multi-method implementation ?