> 在 2016年7月17日,17:44,Tino Heth <[email protected]> 写道:
> 
> 
>> What I hope to achieve is to have a Set of unique objects by their 
>> references. For example, I might put in two rectangles with the same height 
>> and width (which makes them equal, but they are still different instances). 
> I guess this is not the best place for such problems, but did you already 
> look at ObjectIdentifier?
> 
> Tino
> 


The problem is the motivation for my proposal of adding ReferenceSet<Element: 
AnyObject> and ReferenceDictionary<Key: AnyObject, Value> to stdlib.

The original object cannot be retrieved from ObjectIdentifier, which makes it 
unsuitable for my use-case.

- Guoye Zhang
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