Signals and Slots in D

[Walter Bright]

Georg Wrede wrote:
> Walter Bright wrote:
>> Looks like the deletion problem is a real issue. Let me think about it 
>> a bit.
> 
> Hmm. A "big" SS implementation (see previous thread here "Dissecting the 
> SS") c.f. like the 111 case, has more deletion related issues.
> 
> In a non-trivial application one can almost take it for granted that 
> there's instance pooling going on, too.
> 
> A robust implementation would guarantee that any way the observer gets 
> "removed" guarantees it also ceases to exist as an observer. This includes
> 
>  - getting deleted
>  - simply not being referred to anymore
>  - getting moved to the unused instances pool

That's right.